diff --git a/crates/bevy_app/src/event/event.rs b/crates/bevy_app/src/event/event.rs
index 83a8999baf..b07486d2a9 100644
--- a/crates/bevy_app/src/event/event.rs
+++ b/crates/bevy_app/src/event/event.rs
@@ -1,4 +1,4 @@
-use legion::prelude::{ResourceMut, Resources};
+use legion::prelude::{ResMut, Resources};
 use std::marker::PhantomData;
 
 struct EventInstance<T> {
@@ -205,7 +205,7 @@ impl<T> Events<T> {
     }
 
     /// A system that calls [Events::update] once per frame.
-    pub fn update_system(mut events: ResourceMut<Self>) {
+    pub fn update_system(mut events: ResMut<Self>) {
         events.update();
     }
 
diff --git a/crates/bevy_asset/src/lib.rs b/crates/bevy_asset/src/lib.rs
index c1db51b0df..37fb383a27 100644
--- a/crates/bevy_asset/src/lib.rs
+++ b/crates/bevy_asset/src/lib.rs
@@ -76,8 +76,8 @@ impl<T> Assets<T> {
     }
 
     pub fn asset_event_system(
-        mut events: ResourceMut<Events<AssetEvent<T>>>,
-        mut assets: ResourceMut<Assets<T>>,
+        mut events: ResMut<Events<AssetEvent<T>>>,
+        mut assets: ResMut<Assets<T>>,
     ) {
         events.extend(assets.events.drain())
     }
diff --git a/crates/bevy_core/src/time.rs b/crates/bevy_core/src/time.rs
index 0d29d6a093..e14cb03d73 100644
--- a/crates/bevy_core/src/time.rs
+++ b/crates/bevy_core/src/time.rs
@@ -32,10 +32,10 @@ impl Time {
     }
 }
 
-pub fn start_timer_system(mut time: ResourceMut<Time>) {
+pub fn start_timer_system(mut time: ResMut<Time>) {
     time.start();
 }
 
-pub fn stop_timer_system(mut time: ResourceMut<Time>) {
+pub fn stop_timer_system(mut time: ResMut<Time>) {
     time.stop();
 }
diff --git a/crates/bevy_diagnostic/src/frame_time_diagnostics_plugin.rs b/crates/bevy_diagnostic/src/frame_time_diagnostics_plugin.rs
index a3496fad7f..bc9ed32037 100644
--- a/crates/bevy_diagnostic/src/frame_time_diagnostics_plugin.rs
+++ b/crates/bevy_diagnostic/src/frame_time_diagnostics_plugin.rs
@@ -1,7 +1,7 @@
 use crate::{Diagnostic, DiagnosticId, Diagnostics};
 use bevy_app::AppPlugin;
 use bevy_core::time::Time;
-use legion::prelude::{IntoSystem, Resource, ResourceMut};
+use legion::prelude::{IntoSystem, Res, ResMut};
 
 #[derive(Default)]
 pub struct FrameTimeDiagnosticsPlugin;
@@ -18,12 +18,12 @@ impl FrameTimeDiagnosticsPlugin {
     pub const FRAME_TIME: DiagnosticId =
         DiagnosticId::from_u128(54021991829115352065418785002088010276);
 
-    pub fn setup_system(mut diagnostics: ResourceMut<Diagnostics>) {
+    pub fn setup_system(mut diagnostics: ResMut<Diagnostics>) {
         diagnostics.add(Diagnostic::new(Self::FRAME_TIME, "frame_time", 10));
         diagnostics.add(Diagnostic::new(Self::FPS, "fps", 10));
     }
 
-    pub fn diagnostic_system(mut diagnostics: ResourceMut<Diagnostics>, time: Resource<Time>) {
+    pub fn diagnostic_system(mut diagnostics: ResMut<Diagnostics>, time: Res<Time>) {
         if time.delta_seconds_f64 == 0.0 {
             return;
         }
diff --git a/crates/bevy_diagnostic/src/print_diagnostics_plugin.rs b/crates/bevy_diagnostic/src/print_diagnostics_plugin.rs
index 4fed9fb53e..805c6de17b 100644
--- a/crates/bevy_diagnostic/src/print_diagnostics_plugin.rs
+++ b/crates/bevy_diagnostic/src/print_diagnostics_plugin.rs
@@ -65,9 +65,9 @@ impl PrintDiagnosticsPlugin {
     }
 
     pub fn print_diagnostics_system(
-        mut state: ResourceMut<PrintDiagnosticsState>,
-        time: Resource<Time>,
-        diagnostics: Resource<Diagnostics>,
+        mut state: ResMut<PrintDiagnosticsState>,
+        time: Res<Time>,
+        diagnostics: Res<Diagnostics>,
     ) {
         state.elapsed += time.delta_seconds_f64;
         if state.elapsed >= state.wait_seconds {
@@ -87,9 +87,9 @@ impl PrintDiagnosticsPlugin {
     }
 
     pub fn print_diagnostics_debug_system(
-        mut state: ResourceMut<PrintDiagnosticsState>,
-        time: Resource<Time>,
-        diagnostics: Resource<Diagnostics>,
+        mut state: ResMut<PrintDiagnosticsState>,
+        time: Res<Time>,
+        diagnostics: Res<Diagnostics>,
     ) {
         state.elapsed += time.delta_seconds_f64;
         if state.elapsed >= state.wait_seconds {
diff --git a/crates/bevy_input/src/system.rs b/crates/bevy_input/src/system.rs
index f35906a2f3..47d282f934 100644
--- a/crates/bevy_input/src/system.rs
+++ b/crates/bevy_input/src/system.rs
@@ -4,8 +4,8 @@ use legion::prelude::*;
 
 pub fn exit_on_esc_system(resources: &mut Resources) -> Box<dyn Schedulable> {
     let mut keyboard_input_event_reader = resources.get_event_reader::<KeyboardInput>();
-    (move |keyboard_input_events: Resource<Events<KeyboardInput>>,
-           mut app_exit_events: ResourceMut<Events<AppExit>>| {
+    (move |keyboard_input_events: Res<Events<KeyboardInput>>,
+           mut app_exit_events: ResMut<Events<AppExit>>| {
         for event in keyboard_input_event_reader.iter(&keyboard_input_events) {
             if let Some(virtual_key_code) = event.virtual_key_code {
                 if event.state == ElementState::Pressed
diff --git a/crates/bevy_legion/legion_core/src/lib.rs b/crates/bevy_legion/legion_core/src/lib.rs
index 0c5d46de99..7cb99089fa 100644
--- a/crates/bevy_legion/legion_core/src/lib.rs
+++ b/crates/bevy_legion/legion_core/src/lib.rs
@@ -21,8 +21,7 @@ mod zip;
 
 pub mod prelude {
     pub use crate::{
-        // used by system_fn
-        borrow::{Ref, RefMut},
+        borrow::{Ref as Com, RefMut as ComMut},
         command::CommandBuffer,
         entity::Entity,
         event::Event,
diff --git a/crates/bevy_legion/legion_systems/src/lib.rs b/crates/bevy_legion/legion_systems/src/lib.rs
index 57831c36ee..15967be67a 100644
--- a/crates/bevy_legion/legion_systems/src/lib.rs
+++ b/crates/bevy_legion/legion_systems/src/lib.rs
@@ -8,7 +8,7 @@ mod system_fn_types;
 pub use bit_set;
 pub use system::*;
 pub use system_fn::*;
-pub use system_fn_types::{Resource, ResourceMut};
+pub use system_fn_types::{Res, ResMut};
 
 pub mod prelude {
     pub use crate::{
@@ -17,8 +17,8 @@ pub mod prelude {
         resource::{ResourceSet, Resources},
         schedule::{Executor, Runnable, Schedulable, Schedule},
         IntoSystem,
-        Resource,
-        ResourceMut,
+        Res,
+        ResMut,
         System,
         SystemBuilder,
     };
diff --git a/crates/bevy_legion/legion_systems/src/system_fn.rs b/crates/bevy_legion/legion_systems/src/system_fn.rs
index df61c30002..f68bff05f4 100644
--- a/crates/bevy_legion/legion_systems/src/system_fn.rs
+++ b/crates/bevy_legion/legion_systems/src/system_fn.rs
@@ -269,7 +269,7 @@ impl_system_variants![(R1, r1), (R2, r2), (R3, r3), (R4, r4), (R5, r5), (R6, r6)
 mod tests {
     use crate::{
         resource::Resources,
-        system_fn_types::{Resource, ResourceMut},
+        system_fn_types::{Res, ResMut},
         IntoSystem,
     };
     use legion_core::{
@@ -306,7 +306,7 @@ mod tests {
         }
 
         ({
-            |x: Resource<A>, y: Ref<Y>, mut z: RefMut<A>| {
+            |x: Res<A>, y: Ref<Y>, mut z: RefMut<A>| {
                 z.0 += 1;
                 println!("{} {} {}", x.0, y.0, z.0);
             }
@@ -316,7 +316,7 @@ mod tests {
         let mut system = read_write_system.system();
         system.run(&mut world, &mut resources);
 
-        fn resource_system(a: Resource<A>, x: Ref<X>, y: Ref<Y>) {
+        fn resource_system(a: Res<A>, x: Ref<X>, y: Ref<Y>) {
             println!("{} {} {}", a.0, x.0, y.0);
         }
 
@@ -330,14 +330,14 @@ mod tests {
         let mut system = empty_system_mut.system();
         system.run(&mut world, &mut resources);
 
-        fn resource_system_mut(mut a: ResourceMut<A>, x: Ref<X>, y: Ref<Y>) {
+        fn resource_system_mut(mut a: ResMut<A>, x: Ref<X>, y: Ref<Y>) {
             a.0 += 1;
             println!("{} {} {}", a.0, x.0, y.0);
         }
         let mut system = resource_system_mut.system();
         system.run(&mut world, &mut resources);
 
-        fn command_buffer_system(command_buffer: &mut CommandBuffer, mut a: ResourceMut<A>) {
+        fn command_buffer_system(command_buffer: &mut CommandBuffer, mut a: ResMut<A>) {
             a.0 += 1;
             command_buffer.insert((), vec![(X(1), Y(1)), (X(2), Y(2))]);
             println!("{}", a.0);
@@ -348,7 +348,7 @@ mod tests {
 
     #[test]
     fn test_resource_system_fn() {
-        fn my_system(mut a: ResourceMut<A>, x: Ref<X>, mut y: RefMut<Y>) {
+        fn my_system(mut a: ResMut<A>, x: Ref<X>, mut y: RefMut<Y>) {
             if a.0 == 0 {
                 assert_eq!(*a, A(0));
                 assert_eq!(*x, X(2));
diff --git a/crates/bevy_legion/legion_systems/src/system_fn_types.rs b/crates/bevy_legion/legion_systems/src/system_fn_types.rs
index 939f9ff7d1..9de267113e 100644
--- a/crates/bevy_legion/legion_systems/src/system_fn_types.rs
+++ b/crates/bevy_legion/legion_systems/src/system_fn_types.rs
@@ -17,21 +17,21 @@ use std::{
 };
 use tracing::{debug, info, span, Level};
 #[derive(Debug)]
-pub struct Resource<'a, T: 'a> {
+pub struct Res<'a, T: 'a> {
     #[allow(dead_code)]
     // held for drop impl
     _marker: PhantomData<&'a ()>,
     value: *const T,
 }
 
-unsafe impl<'a, T: resource::Resource> Send for Resource<'a, T> {}
-unsafe impl<'a, T: resource::Resource> Sync for Resource<'a, T> {}
-impl<'a, T: 'a> Clone for Resource<'a, T> {
+unsafe impl<'a, T: resource::Resource> Send for Res<'a, T> {}
+unsafe impl<'a, T: resource::Resource> Sync for Res<'a, T> {}
+impl<'a, T: 'a> Clone for Res<'a, T> {
     #[inline(always)]
-    fn clone(&self) -> Self { Resource::new(self.value) }
+    fn clone(&self) -> Self { Res::new(self.value) }
 }
 
-impl<'a, T: 'a> Resource<'a, T> {
+impl<'a, T: 'a> Res<'a, T> {
     #[inline(always)]
     fn new(resource: *const T) -> Self {
         Self {
@@ -41,37 +41,37 @@ impl<'a, T: 'a> Resource<'a, T> {
     }
 
     #[inline(always)]
-    pub fn map<K: 'a, F: FnMut(&T) -> &K>(&self, mut f: F) -> Resource<'a, K> {
-        Resource::new(f(&self))
+    pub fn map<K: 'a, F: FnMut(&T) -> &K>(&self, mut f: F) -> Res<'a, K> {
+        Res::new(f(&self))
     }
 }
 
-impl<'a, T: 'a> Deref for Resource<'a, T> {
+impl<'a, T: 'a> Deref for Res<'a, T> {
     type Target = T;
 
     #[inline(always)]
     fn deref(&self) -> &Self::Target { unsafe { &*self.value } }
 }
 
-impl<'a, T: 'a> AsRef<T> for Resource<'a, T> {
+impl<'a, T: 'a> AsRef<T> for Res<'a, T> {
     #[inline(always)]
     fn as_ref(&self) -> &T { unsafe { &*self.value } }
 }
 
-impl<'a, T: 'a> std::borrow::Borrow<T> for Resource<'a, T> {
+impl<'a, T: 'a> std::borrow::Borrow<T> for Res<'a, T> {
     #[inline(always)]
     fn borrow(&self) -> &T { unsafe { &*self.value } }
 }
 
-impl<'a, T> PartialEq for Resource<'a, T>
+impl<'a, T> PartialEq for Res<'a, T>
 where
     T: 'a + PartialEq,
 {
     fn eq(&self, other: &Self) -> bool { self.value == other.value }
 }
-impl<'a, T> Eq for Resource<'a, T> where T: 'a + Eq {}
+impl<'a, T> Eq for Res<'a, T> where T: 'a + Eq {}
 
-impl<'a, T> PartialOrd for Resource<'a, T>
+impl<'a, T> PartialOrd for Res<'a, T>
 where
     T: 'a + PartialOrd,
 {
@@ -79,48 +79,48 @@ where
         self.value.partial_cmp(&other.value)
     }
 }
-impl<'a, T> Ord for Resource<'a, T>
+impl<'a, T> Ord for Res<'a, T>
 where
     T: 'a + Ord,
 {
     fn cmp(&self, other: &Self) -> std::cmp::Ordering { self.value.cmp(&other.value) }
 }
 
-impl<'a, T> Hash for Resource<'a, T>
+impl<'a, T> Hash for Res<'a, T>
 where
     T: 'a + Hash,
 {
     fn hash<H: Hasher>(&self, state: &mut H) { self.value.hash(state); }
 }
 
-impl<'a, T: resource::Resource> ResourceSet for Resource<'a, T> {
-    type PreparedResources = Resource<'a, T>;
+impl<'a, T: resource::Resource> ResourceSet for Res<'a, T> {
+    type PreparedResources = Res<'a, T>;
 
     unsafe fn fetch_unchecked(resources: &Resources) -> Self::PreparedResources {
         let resource = resources
             .get::<T>()
             .unwrap_or_else(|| panic!("Failed to fetch resource!: {}", std::any::type_name::<T>()));
-        Resource::new(resource.deref() as *const T)
+        Res::new(resource.deref() as *const T)
     }
     fn read_types() -> Vec<ResourceTypeId> { vec![ResourceTypeId::of::<T>()] }
     fn write_types() -> Vec<ResourceTypeId> { Vec::new() }
 }
 
 #[derive(Debug)]
-pub struct ResourceMut<'a, T: 'a> {
+pub struct ResMut<'a, T: 'a> {
     // held for drop impl
     _marker: PhantomData<&'a mut ()>,
     value: *mut T,
 }
 
-unsafe impl<'a, T: resource::Resource> Send for ResourceMut<'a, T> {}
-unsafe impl<'a, T: resource::Resource> Sync for ResourceMut<'a, T> {}
-impl<'a, T: 'a> Clone for ResourceMut<'a, T> {
+unsafe impl<'a, T: resource::Resource> Send for ResMut<'a, T> {}
+unsafe impl<'a, T: resource::Resource> Sync for ResMut<'a, T> {}
+impl<'a, T: 'a> Clone for ResMut<'a, T> {
     #[inline(always)]
-    fn clone(&self) -> Self { ResourceMut::new(self.value) }
+    fn clone(&self) -> Self { ResMut::new(self.value) }
 }
 
-impl<'a, T: 'a> ResourceMut<'a, T> {
+impl<'a, T: 'a> ResMut<'a, T> {
     #[inline(always)]
     fn new(resource: *mut T) -> Self {
         Self {
@@ -130,42 +130,42 @@ impl<'a, T: 'a> ResourceMut<'a, T> {
     }
 
     #[inline(always)]
-    pub fn map_into<K: 'a, F: FnMut(&mut T) -> K>(mut self, mut f: F) -> ResourceMut<'a, K> {
-        ResourceMut::new(&mut f(&mut self))
+    pub fn map_into<K: 'a, F: FnMut(&mut T) -> K>(mut self, mut f: F) -> ResMut<'a, K> {
+        ResMut::new(&mut f(&mut self))
     }
 }
 
-impl<'a, T: 'a> Deref for ResourceMut<'a, T> {
+impl<'a, T: 'a> Deref for ResMut<'a, T> {
     type Target = T;
 
     #[inline(always)]
     fn deref(&self) -> &Self::Target { unsafe { &*self.value } }
 }
 
-impl<'a, T: 'a> DerefMut for ResourceMut<'a, T> {
+impl<'a, T: 'a> DerefMut for ResMut<'a, T> {
     #[inline(always)]
     fn deref_mut(&mut self) -> &mut Self::Target { unsafe { &mut *self.value } }
 }
 
-impl<'a, T: 'a> AsRef<T> for ResourceMut<'a, T> {
+impl<'a, T: 'a> AsRef<T> for ResMut<'a, T> {
     #[inline(always)]
     fn as_ref(&self) -> &T { unsafe { &*self.value } }
 }
 
-impl<'a, T: 'a> std::borrow::Borrow<T> for ResourceMut<'a, T> {
+impl<'a, T: 'a> std::borrow::Borrow<T> for ResMut<'a, T> {
     #[inline(always)]
     fn borrow(&self) -> &T { unsafe { &*self.value } }
 }
 
-impl<'a, T> PartialEq for ResourceMut<'a, T>
+impl<'a, T> PartialEq for ResMut<'a, T>
 where
     T: 'a + PartialEq,
 {
     fn eq(&self, other: &Self) -> bool { self.value == other.value }
 }
-impl<'a, T> Eq for ResourceMut<'a, T> where T: 'a + Eq {}
+impl<'a, T> Eq for ResMut<'a, T> where T: 'a + Eq {}
 
-impl<'a, T> PartialOrd for ResourceMut<'a, T>
+impl<'a, T> PartialOrd for ResMut<'a, T>
 where
     T: 'a + PartialOrd,
 {
@@ -173,28 +173,28 @@ where
         self.value.partial_cmp(&other.value)
     }
 }
-impl<'a, T> Ord for ResourceMut<'a, T>
+impl<'a, T> Ord for ResMut<'a, T>
 where
     T: 'a + Ord,
 {
     fn cmp(&self, other: &Self) -> std::cmp::Ordering { self.value.cmp(&other.value) }
 }
 
-impl<'a, T> Hash for ResourceMut<'a, T>
+impl<'a, T> Hash for ResMut<'a, T>
 where
     T: 'a + Hash,
 {
     fn hash<H: Hasher>(&self, state: &mut H) { self.value.hash(state); }
 }
 
-impl<'a, T: resource::Resource> ResourceSet for ResourceMut<'a, T> {
-    type PreparedResources = ResourceMut<'a, T>;
+impl<'a, T: resource::Resource> ResourceSet for ResMut<'a, T> {
+    type PreparedResources = ResMut<'a, T>;
 
     unsafe fn fetch_unchecked(resources: &Resources) -> Self::PreparedResources {
         let mut resource = resources
             .get_mut::<T>()
             .unwrap_or_else(|| panic!("Failed to fetch resource!: {}", std::any::type_name::<T>()));
-        ResourceMut::new(resource.deref_mut() as *mut T)
+        ResMut::new(resource.deref_mut() as *mut T)
     }
     fn read_types() -> Vec<ResourceTypeId> { vec![ResourceTypeId::of::<T>()] }
     fn write_types() -> Vec<ResourceTypeId> { Vec::new() }
diff --git a/crates/bevy_render/src/shader/uniform.rs b/crates/bevy_render/src/shader/uniform.rs
index 3788db01fc..4b04c2af71 100644
--- a/crates/bevy_render/src/shader/uniform.rs
+++ b/crates/bevy_render/src/shader/uniform.rs
@@ -19,7 +19,7 @@ pub trait AsUniforms: Send + Sync + 'static {
     fn get_vertex_buffer_descriptor() -> Option<&'static VertexBufferDescriptor>;
 }
 
-pub fn shader_def_system<T>(uniforms: Ref<T>, mut renderable: RefMut<Renderable>)
+pub fn shader_def_system<T>(uniforms: Com<T>, mut renderable: ComMut<Renderable>)
 where
     T: AsUniforms + Send + Sync + 'static,
 {
@@ -34,9 +34,9 @@ where
 }
 
 pub fn asset_shader_def_system<T>(
-    assets: Resource<Assets<T>>,
-    asset_handle: Ref<Handle<T>>,
-    mut renderable: RefMut<Renderable>,
+    assets: Res<Assets<T>>,
+    asset_handle: Com<Handle<T>>,
+    mut renderable: ComMut<Renderable>,
 ) where
     T: AsUniforms + Send + Sync + 'static,
 {
diff --git a/crates/bevy_wgpu/src/diagnostic/wgpu_resource_diagnostics_plugin.rs b/crates/bevy_wgpu/src/diagnostic/wgpu_resource_diagnostics_plugin.rs
index 9cb33b2043..b5583062c5 100644
--- a/crates/bevy_wgpu/src/diagnostic/wgpu_resource_diagnostics_plugin.rs
+++ b/crates/bevy_wgpu/src/diagnostic/wgpu_resource_diagnostics_plugin.rs
@@ -2,7 +2,7 @@ use crate::renderer::WgpuRenderResourceContext;
 use bevy_app::{AppBuilder, AppPlugin};
 use bevy_diagnostic::{Diagnostic, DiagnosticId, Diagnostics};
 use bevy_render::renderer::RenderResources;
-use legion::prelude::{IntoSystem, Resource, ResourceMut};
+use legion::prelude::{IntoSystem, Res, ResMut};
 
 #[derive(Default)]
 pub struct WgpuResourceDiagnosticsPlugin;
@@ -51,7 +51,7 @@ impl WgpuResourceDiagnosticsPlugin {
     pub const RENDER_PIPELINES: DiagnosticId =
         DiagnosticId::from_u128(278527620040377353875091478462209885377);
 
-    pub fn setup_system(mut diagnostics: ResourceMut<Diagnostics>) {
+    pub fn setup_system(mut diagnostics: ResMut<Diagnostics>) {
         diagnostics.add(Diagnostic::new(
             Self::WINDOW_SURFACES,
             "window_surfaces",
@@ -93,8 +93,8 @@ impl WgpuResourceDiagnosticsPlugin {
     }
 
     pub fn diagnostic_system(
-        mut diagnostics: ResourceMut<Diagnostics>,
-        render_resources: Resource<RenderResources>,
+        mut diagnostics: ResMut<Diagnostics>,
+        render_resources: Res<RenderResources>,
     ) {
         let render_resource_context = render_resources
             .context
diff --git a/examples/2d/sprite.rs b/examples/2d/sprite.rs
index 50c8dae1a9..7a506ec0ce 100644
--- a/examples/2d/sprite.rs
+++ b/examples/2d/sprite.rs
@@ -9,8 +9,8 @@ fn main() {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut textures: ResourceMut<Assets<Texture>>,
-    mut materials: ResourceMut<Assets<ColorMaterial>>,
+    mut textures: ResMut<Assets<Texture>>,
+    mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
     let texture_path = concat!(env!("CARGO_MANIFEST_DIR"), "/assets/branding/icon.png");
     let texture = Texture::load(TextureType::Png(texture_path.to_string()));
diff --git a/examples/3d/load_model.rs b/examples/3d/load_model.rs
index 8a273e5882..5831222aa3 100644
--- a/examples/3d/load_model.rs
+++ b/examples/3d/load_model.rs
@@ -9,8 +9,8 @@ fn main() {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     // load the mesh
     let model_path = concat!(env!("CARGO_MANIFEST_DIR"), "/assets/models/Monkey.gltf");
diff --git a/examples/3d/parenting.rs b/examples/3d/parenting.rs
index d6c3590368..b68e665d70 100644
--- a/examples/3d/parenting.rs
+++ b/examples/3d/parenting.rs
@@ -11,15 +11,15 @@ fn main() {
 }
 
 /// rotates the parent, which will result in the child also rotating
-fn rotator_system(time: Resource<Time>, _rotator: RefMut<Rotator>, mut rotation: RefMut<Rotation>) {
+fn rotator_system(time: Res<Time>, _rotator: ComMut<Rotator>, mut rotation: ComMut<Rotation>) {
     rotation.0 = rotation.0 * Quat::from_rotation_x(3.0 * time.delta_seconds);
 }
 
 /// set up a simple scene with a "parent" cube and a "child" cube
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     let cube_handle = meshes.add(Mesh::from(shape::Cube));
     let cube_material_handle = materials.add(StandardMaterial {
diff --git a/examples/3d/scene.rs b/examples/3d/scene.rs
index 21809de3cf..2b234a2ce9 100644
--- a/examples/3d/scene.rs
+++ b/examples/3d/scene.rs
@@ -10,8 +10,8 @@ fn main() {
 /// set up a simple scene
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     // create a cube and a plane mesh
     let cube_handle = meshes.add(Mesh::from(shape::Cube));
diff --git a/examples/3d/spawner.rs b/examples/3d/spawner.rs
index e1e357b231..ebd858e62c 100644
--- a/examples/3d/spawner.rs
+++ b/examples/3d/spawner.rs
@@ -15,10 +15,10 @@ fn main() {
 }
 
 fn move_cubes(
-    time: Resource<Time>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
-    mut translation: RefMut<Translation>,
-    material_handle: Ref<Handle<StandardMaterial>>,
+    time: Res<Time>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+    mut translation: ComMut<Translation>,
+    material_handle: Com<Handle<StandardMaterial>>,
 ) {
     let material = materials.get_mut(&material_handle).unwrap();
     translation.0 += math::vec3(1.0, 0.0, 0.0) * time.delta_seconds;
@@ -27,8 +27,8 @@ fn move_cubes(
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     let cube_handle = meshes.add(Mesh::from(shape::Cube));
     let plane_handle = meshes.add(Mesh::from(shape::Plane { size: 10.0 }));
diff --git a/examples/3d/texture.rs b/examples/3d/texture.rs
index ed632b4997..7fd6977836 100644
--- a/examples/3d/texture.rs
+++ b/examples/3d/texture.rs
@@ -10,9 +10,9 @@ fn main() {
 /// sets up a scene with textured entities
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut textures: ResourceMut<Assets<Texture>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut textures: ResMut<Assets<Texture>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     // load a texture
     let texture_path = concat!(
diff --git a/examples/app/dynamic_plugin_loading/example_plugin/src/lib.rs b/examples/app/dynamic_plugin_loading/example_plugin/src/lib.rs
index c5b85ce09e..b46a1ab1fb 100644
--- a/examples/app/dynamic_plugin_loading/example_plugin/src/lib.rs
+++ b/examples/app/dynamic_plugin_loading/example_plugin/src/lib.rs
@@ -11,8 +11,8 @@ impl AppPlugin for ExamplePlugin {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     let cube_handle = meshes.add(Mesh::from(shape::Cube));
     let cube_material_handle = materials.add(StandardMaterial {
diff --git a/examples/app/plugin.rs b/examples/app/plugin.rs
index 445c4c0bd1..8ac88f597d 100644
--- a/examples/app/plugin.rs
+++ b/examples/app/plugin.rs
@@ -40,7 +40,7 @@ struct PrintMessageState {
     elapsed_time: f32,
 }
 
-fn print_message_system(time: Resource<Time>, mut state: ResourceMut<PrintMessageState>) {
+fn print_message_system(time: Res<Time>, mut state: ResMut<PrintMessageState>) {
     state.elapsed_time += time.delta_seconds;
     if state.elapsed_time > state.duration.as_secs_f32() {
         println!("{}", state.message);
diff --git a/examples/diagnostics/custom_diagnostic.rs b/examples/diagnostics/custom_diagnostic.rs
index e17f525e9a..fe0c70cd46 100644
--- a/examples/diagnostics/custom_diagnostic.rs
+++ b/examples/diagnostics/custom_diagnostic.rs
@@ -17,7 +17,7 @@ fn main() {
 pub const SYSTEM_ITERATION_COUNT: DiagnosticId =
     DiagnosticId::from_u128(337040787172757619024841343456040760896);
 
-fn setup_diagnostic_system(mut diagnostics: ResourceMut<Diagnostics>) {
+fn setup_diagnostic_system(mut diagnostics: ResMut<Diagnostics>) {
     // Diagnostics must be initialized before measurements can be added.
     // In general it's a good idea to set them up in a "startup system".
     diagnostics.add(Diagnostic::new(
@@ -27,7 +27,7 @@ fn setup_diagnostic_system(mut diagnostics: ResourceMut<Diagnostics>) {
     ));
 }
 
-fn my_system(mut diagnostics: ResourceMut<Diagnostics>) {
+fn my_system(mut diagnostics: ResMut<Diagnostics>) {
     // Add a measurement of 10.0 for our diagnostic each time this system runs
     diagnostics.add_measurement(SYSTEM_ITERATION_COUNT, 10.0);
 }
diff --git a/examples/ecs/ecs_guide.rs b/examples/ecs/ecs_guide.rs
index 65482a859e..a5bbf59910 100644
--- a/examples/ecs/ecs_guide.rs
+++ b/examples/ecs/ecs_guide.rs
@@ -71,8 +71,8 @@ fn print_message_system() {
 
 // Systems can also read and modify resources. This system starts a new "round" on each update:
 // NOTE: "mut" denotes that the resource is "mutable"
-// Resource<GameRules> is read-only. ResourceMut<GameState> can modify the resource
-fn new_round_system(game_rules: Resource<GameRules>, mut game_state: ResourceMut<GameState>) {
+// Res<GameRules> is read-only. ResMut<GameState> can modify the resource
+fn new_round_system(game_rules: Res<GameRules>, mut game_state: ResMut<GameState>) {
     game_state.current_round += 1;
     println!(
         "Begin round {} of {}",
@@ -81,8 +81,8 @@ fn new_round_system(game_rules: Resource<GameRules>, mut game_state: ResourceMut
 }
 
 // This system runs once for each entity with both the "Player" and "Score" component.
-// NOTE: Ref<Player> is a read-only reference, whereas RefMut<Score> can modify the component
-fn score_system(player: Ref<Player>, mut score: RefMut<Score>) {
+// NOTE: Com<Player> is a read-only component Comerence, whereas ComMut<Score> can modify the component
+fn score_system(player: Com<Player>, mut score: ComMut<Score>) {
     let scored_a_point = random::<bool>();
     if scored_a_point {
         score.value += 1;
@@ -104,10 +104,10 @@ fn score_system(player: Ref<Player>, mut score: RefMut<Score>) {
 // accesses the "GameRules" resource to determine if a player has won.
 // NOTE: resources must always come before components in system functions
 fn score_check_system(
-    game_rules: Resource<GameRules>,
-    mut game_state: ResourceMut<GameState>,
-    player: Ref<Player>,
-    score: Ref<Score>,
+    game_rules: Res<GameRules>,
+    mut game_state: ResMut<GameState>,
+    player: Com<Player>,
+    score: Com<Score>,
 ) {
     if score.value == game_rules.winning_score {
         game_state.winning_player = Some(player.name.clone());
@@ -117,9 +117,9 @@ fn score_check_system(
 // This system ends the game if we meet the right conditions. This fires an AppExit event, which tells our
 // App to quit. Check out the "event.rs" example if you want to learn more about using events.
 fn game_over_system(
-    game_rules: Resource<GameRules>,
-    game_state: Resource<GameState>,
-    mut app_exit_events: ResourceMut<Events<AppExit>>,
+    game_rules: Res<GameRules>,
+    game_state: Res<GameState>,
+    mut app_exit_events: ResMut<Events<AppExit>>,
 ) {
     if let Some(ref player) = game_state.winning_player {
         println!("{} won the game!", player);
@@ -175,8 +175,8 @@ fn startup_system(world: &mut World, resources: &mut Resources) {
 // NOTE: Command buffers must always come before resources and components in system functions
 fn new_player_system(
     command_buffer: &mut CommandBuffer,
-    game_rules: Resource<GameRules>,
-    mut game_state: ResourceMut<GameState>,
+    game_rules: Res<GameRules>,
+    mut game_state: ResMut<GameState>,
 ) {
     // Randomly add a new player
     let add_new_player = random::<bool>();
@@ -232,7 +232,7 @@ fn thread_local_system(world: &mut World, resources: &mut Resources) {
 #[allow(dead_code)]
 fn closure_system() -> Box<dyn Schedulable> {
     let mut counter = 0;
-    (move |player: Ref<Player>, score: Ref<Score>| {
+    (move |player: Com<Player>, score: Com<Score>| {
         println!("processed: {} {}", player.name, score.value);
         println!("this ran {} times", counter);
         counter += 1;
@@ -250,7 +250,7 @@ struct State {
 
 // NOTE: this doesn't do anything relevant to our game, it is just here for illustrative purposes
 #[allow(dead_code)]
-fn stateful_system(mut state: RefMut<State>, player: Ref<Player>, score: RefMut<Score>) {
+fn stateful_system(mut state: ComMut<State>, player: Com<Player>, score: ComMut<Score>) {
     println!("processed: {} {}", player.name, score.value);
     println!("this ran {} times", state.counter);
     state.counter += 1;
@@ -267,7 +267,7 @@ fn complex_system(resources: &mut Resources) -> Box<dyn Schedulable> {
     SystemBuilder::new("complex_system")
         .read_resource::<GameState>()
         .write_resource::<GameRules>()
-        // this query is equivalent to the system we saw above: system(player: Ref<Player>, mut score: RefMut<Score>)
+        // this query is equivalent to the system we saw above: system(player: Com<Player>, mut score: ComMut<Score>)
         .with_query(<(Read<Player>, Write<Score>)>::query())
         // this query only returns entities with a Player component that has changed since the last update
         .with_query(<Read<Player>>::query().filter(changed::<Player>()))
@@ -307,7 +307,7 @@ fn main() {
         .add_startup_system(startup_system)
         // my_system.system() calls converts normal rust functions into ECS systems:
         .add_system(print_message_system.system())
-        // Systems that need a reference to Resources to be constructed can be added using "init_system":
+        // Systems that need a Comerence to Resources to be constructed can be added using "init_system":
         // .init_system(complex_system)
         //
         // SYSTEM EXECUTION ORDER
@@ -316,7 +316,7 @@ fn main() {
         // For example, we want our "game over" system to execute after all other systems to ensure we don't
         // accidentally run the game for an extra round.
         //
-        // First, if a system writes a component or resource (RefMut / ResourceMut), it will force a synchronization.
+        // First, if a system writes a component or resource (ComMut / ResMut), it will force a synchronization.
         // Any systems that access the data type and were registered BEFORE the system will need to finish first.
         // Any systems that were registered _after_ the system will need to wait for it to finish. This is a great
         // default that makes everything "just work" as fast as possible without us needing to think about it ... provided
diff --git a/examples/ecs/event.rs b/examples/ecs/event.rs
index 7efc67a787..0dd5e08718 100644
--- a/examples/ecs/event.rs
+++ b/examples/ecs/event.rs
@@ -22,9 +22,9 @@ struct EventTriggerState {
 
 // sends MyEvent every second
 fn event_trigger_system(
-    mut state: ResourceMut<EventTriggerState>,
-    mut my_events: ResourceMut<Events<MyEvent>>,
-    time: Resource<Time>,
+    mut state: ResMut<EventTriggerState>,
+    mut my_events: ResMut<Events<MyEvent>>,
+    time: Res<Time>,
 ) {
     state.elapsed += time.delta_seconds;
     if state.elapsed > 1.0 {
@@ -43,8 +43,8 @@ struct EventListenerState {
 
 // prints events as they come in
 fn event_listener_system(
-    mut state: ResourceMut<EventListenerState>,
-    my_events: Resource<Events<MyEvent>>,
+    mut state: ResMut<EventListenerState>,
+    my_events: Res<Events<MyEvent>>,
 ) {
     for my_event in state.my_event_reader.iter(&my_events) {
         println!("{}", my_event.message);
diff --git a/examples/input/input_keyboard.rs b/examples/input/input_keyboard.rs
index 40dedcdc5a..a697ed5b95 100644
--- a/examples/input/input_keyboard.rs
+++ b/examples/input/input_keyboard.rs
@@ -22,8 +22,8 @@ struct State {
 
 /// adjusts move state based on keyboard input
 fn collect_input(
-    mut state: ResourceMut<State>,
-    keyboard_input_events: Resource<Events<KeyboardInput>>,
+    mut state: ResMut<State>,
+    keyboard_input_events: Res<Events<KeyboardInput>>,
 ) {
     for event in state.event_reader.iter(&keyboard_input_events) {
         match event {
@@ -48,10 +48,10 @@ fn collect_input(
 
 /// moves our cube left when the "left" key is pressed. moves it right when the "right" key is pressed
 fn move_on_input(
-    state: Resource<State>,
-    time: Resource<Time>,
-    mut translation: RefMut<Translation>,
-    _: Ref<Handle<Mesh>>,
+    state: Res<State>,
+    time: Res<Time>,
+    mut translation: ComMut<Translation>,
+    _: Com<Handle<Mesh>>,
 ) {
     if state.moving_left {
         translation.0 += math::vec3(1.0, 0.0, 0.0) * time.delta_seconds;
@@ -65,8 +65,8 @@ fn move_on_input(
 /// creates a simple scene
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<StandardMaterial>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     let cube_handle = meshes.add(Mesh::from(shape::Cube));
     let cube_material_handle = materials.add(StandardMaterial {
diff --git a/examples/input/input_mouse.rs b/examples/input/input_mouse.rs
index be6bac495d..9b9a036d8b 100644
--- a/examples/input/input_mouse.rs
+++ b/examples/input/input_mouse.rs
@@ -19,9 +19,9 @@ struct State {
 
 /// prints out mouse events as they come in
 fn mouse_input_system(
-    mut state: ResourceMut<State>,
-    mouse_button_input_events: Ref<Events<MouseButtonInput>>,
-    mouse_motion_events: Ref<Events<MouseMotionInput>>,
+    mut state: ResMut<State>,
+    mouse_button_input_events: Com<Events<MouseButtonInput>>,
+    mouse_motion_events: Com<Events<MouseMotionInput>>,
 ) {
     for event in state
         .mouse_button_event_reader
diff --git a/examples/shader/shader_custom_material.rs b/examples/shader/shader_custom_material.rs
index 3c0efdab77..13c6c4b830 100644
--- a/examples/shader/shader_custom_material.rs
+++ b/examples/shader/shader_custom_material.rs
@@ -15,11 +15,11 @@ struct MyMaterial {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut pipelines: ResourceMut<Assets<PipelineDescriptor>>,
-    mut shaders: ResourceMut<Assets<Shader>>,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<MyMaterial>>,
-    mut render_graph: ResourceMut<RenderGraph>,
+    mut pipelines: ResMut<Assets<PipelineDescriptor>>,
+    mut shaders: ResMut<Assets<Shader>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<MyMaterial>>,
+    mut render_graph: ResMut<RenderGraph>,
 ) {
     // create new shader pipeline and add to main pass in Render Graph
     let pipeline_handle = {
diff --git a/examples/shader/shader_defs.rs b/examples/shader/shader_defs.rs
index 3c75594f84..efcfe00821 100644
--- a/examples/shader/shader_defs.rs
+++ b/examples/shader/shader_defs.rs
@@ -21,11 +21,11 @@ struct MyMaterial {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut pipelines: ResourceMut<Assets<PipelineDescriptor>>,
-    mut shaders: ResourceMut<Assets<Shader>>,
-    mut meshes: ResourceMut<Assets<Mesh>>,
-    mut materials: ResourceMut<Assets<MyMaterial>>,
-    mut render_graph: ResourceMut<RenderGraph>,
+    mut pipelines: ResMut<Assets<PipelineDescriptor>>,
+    mut shaders: ResMut<Assets<Shader>>,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<MyMaterial>>,
+    mut render_graph: ResMut<RenderGraph>,
 ) {
     // create new shader pipeline and add to main pass in Render Graph
     let pipeline_handle = {
diff --git a/examples/ui/text.rs b/examples/ui/text.rs
index 63c087f6c4..c1f958b3c5 100644
--- a/examples/ui/text.rs
+++ b/examples/ui/text.rs
@@ -10,8 +10,8 @@ fn main() {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut textures: ResourceMut<Assets<Texture>>,
-    mut materials: ResourceMut<Assets<ColorMaterial>>,
+    mut textures: ResMut<Assets<Texture>>,
+    mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
     let font_path = concat!(
         env!("CARGO_MANIFEST_DIR"),
diff --git a/examples/ui/ui.rs b/examples/ui/ui.rs
index bf57028eb6..39d4d4c488 100644
--- a/examples/ui/ui.rs
+++ b/examples/ui/ui.rs
@@ -9,8 +9,8 @@ fn main() {
 
 fn setup(
     command_buffer: &mut CommandBuffer,
-    mut textures: ResourceMut<Assets<Texture>>,
-    mut materials: ResourceMut<Assets<ColorMaterial>>,
+    mut textures: ResMut<Assets<Texture>>,
+    mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
     // TODO: "background" 3D temporarily disabled until depth mismatch is fixed
     // let mut mesh_storage = resources.get_mut::<AssetStorage<Mesh>>().unwrap();
diff --git a/examples/ui/ui_bench.rs b/examples/ui/ui_bench.rs
index e656ad6bed..0d726ffb53 100644
--- a/examples/ui/ui_bench.rs
+++ b/examples/ui/ui_bench.rs
@@ -10,10 +10,10 @@ fn main() {
 }
 
 fn placement_system(
-    time: Resource<Time>,
-    materials: Resource<Assets<ColorMaterial>>,
-    mut node: RefMut<Node>,
-    material_handle: Ref<Handle<ColorMaterial>>,
+    time: Res<Time>,
+    materials: Res<Assets<ColorMaterial>>,
+    mut node: ComMut<Node>,
+    material_handle: Com<Handle<ColorMaterial>>,
 ) {
     let material = materials.get(&material_handle).unwrap();
     if material.color.r > 0.2 {
@@ -21,7 +21,7 @@ fn placement_system(
     }
 }
 
-fn setup(command_buffer: &mut CommandBuffer, mut materials: ResourceMut<Assets<ColorMaterial>>) {
+fn setup(command_buffer: &mut CommandBuffer, mut materials: ResMut<Assets<ColorMaterial>>) {
     let mut builder = command_buffer.build();
     builder.add_entity(Camera2dEntity::default());
 
diff --git a/examples/window/multiple_windows.rs b/examples/window/multiple_windows.rs
index af28f7a4be..8319b98240 100644
--- a/examples/window/multiple_windows.rs
+++ b/examples/window/multiple_windows.rs
@@ -7,7 +7,7 @@ fn main() {
         .run();
 }
 
-fn setup(mut create_window_events: ResourceMut<Events<CreateWindow>>) {
+fn setup(mut create_window_events: ResMut<Events<CreateWindow>>) {
     // sends out a "CreateWindow" event, which will be received by the windowing backend
     create_window_events.send(CreateWindow {
         descriptor: WindowDescriptor {
diff --git a/src/prelude.rs b/src/prelude.rs
index bcb08ec0b3..5078a96f37 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -46,7 +46,7 @@ pub use crate::{
     AddDefaultPlugins,
 };
 pub use legion::{
-    borrow::{Ref, RefMut},
+    borrow::{Ref as Com, RefMut as ComMut},
     command::CommandBuffer,
     entity::Entity,
     event::Event as LegionEvent,
@@ -56,7 +56,7 @@ pub use legion::{
         bit_set::BitSet,
         resource::{ResourceSet, Resources},
         schedule::{Executor, Runnable, Schedulable, Schedule},
-        IntoSystem, Resource, ResourceMut, SubWorld, SystemBuilder,
+        IntoSystem, Res, ResMut, SubWorld, SystemBuilder,
     },
     world::{Universe, World},
 };