diff --git a/fish/aliases.config.fish b/fish/aliases.config.fish
index 1f843f9..9be14a0 100644
--- a/fish/aliases.config.fish
+++ b/fish/aliases.config.fish
@@ -4,9 +4,9 @@
 
 # Shell aliases.
 abbr -a rl --position command "source ~/.config/fish/config.fish"
-abbr -a c  --position command "clear"
-abbr -a e  --position command "$EDITOR"
-abbr -a v  --position command "$EDITOR"
+abbr -a c --position command clear
+abbr -a e --position command "$EDITOR"
+abbr -a v --position command "$EDITOR"
 
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
@@ -34,14 +34,6 @@ abbr -a rm --position command "rm -rf"
 #                                  └─ recursively remove directories and files
 
 # Colored grep output.
-abbr -a grep  --position command "grep  --color=auto"
+abbr -a grep --position command "grep  --color=auto"
 abbr -a fgrep --position command "fgrep --color=auto"
 abbr -a egrep --position command "egrep --color=auto"
-
-# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-if [ "$(uname)" = "Darwin" ]
-  abbr -a o --position command "open"
-else if [ "$(uname)" = "Linux" ]
-  abbr -a o --position command "xdg-open"
-end
diff --git a/os/aliases.config.fish b/os/aliases.config.fish
new file mode 100644
index 0000000..653d665
--- /dev/null
+++ b/os/aliases.config.fish
@@ -0,0 +1,9 @@
+#!/usr/bin/env fish
+
+if [ "$(uname)" = Darwin ]
+    abbr -a afk --position command "osascript -e 'tell application \"System Events\" to sleep'"
+    abbr -a o --position command open
+
+else if [ "$(uname)" = Linux ]
+    abbr -a o --position command xdg-open
+end