diff --git a/lib/key-bindings.zsh b/lib/key-bindings.zsh
index 49f80c8f3..94f1842f3 100644
--- a/lib/key-bindings.zsh
+++ b/lib/key-bindings.zsh
@@ -1,34 +1,43 @@
-# TODO: Explain what some of this does..
+# http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html
+# http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Zle-Builtins
+# http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Standard-Widgets
 
-bindkey -e
-bindkey '\ew' kill-region
-bindkey -s '\el' "ls\n"
-bindkey '^r' history-incremental-search-backward
-bindkey "^[[5~" up-line-or-history
-bindkey "^[[6~" down-line-or-history
+# Make sure that the terminal is in application mode when zle is active, since
+# only then values from $terminfo are valid
+if (( ${+terminfo[smkx]} )) && (( ${+terminfo[rmkx]} )); then
+  function zle-line-init() {
+    echoti smkx
+  }
+  function zle-line-finish() {
+    echoti rmkx
+  }
+  zle -N zle-line-init
+  zle -N zle-line-finish
+fi
 
-# make search up and down work, so partially type and hit up/down to find relevant stuff
-bindkey '^[[A' up-line-or-search
-bindkey '^[[B' down-line-or-search
+bindkey -e                                          # Use emacs key bindings
 
-bindkey "^[[H" beginning-of-line
-bindkey "^[[1~" beginning-of-line
-bindkey "^[OH" beginning-of-line
-bindkey "^[[F"  end-of-line
-bindkey "^[[4~" end-of-line
-bindkey "^[OF" end-of-line
-bindkey ' ' magic-space    # also do history expansion on space
+bindkey '\ew' kill-region                           # [Esc-w] - Kill from the cursor to the mark
+bindkey -s '\el' 'ls\n'                             # [Esc-l] - run command: ls
+bindkey '^r' history-incremental-search-backward    # [Ctrl-r] - Search backward incrementally for a specified string. The string may begin with ^ to anchor the search to the beginning of the line.
+bindkey "${terminfo[kpp]}" up-line-or-history       # [PageUp] - Up a line of history
+bindkey "${terminfo[knp]}" down-line-or-history     # [PageDown] - Down a line of history
 
-bindkey "^[[1;5C" forward-word
-bindkey "^[[1;5D" backward-word
+bindkey "${terminfo[kcuu1]}" up-line-or-search      # start typing + [Up-Arrow] - fuzzy find history forward
+bindkey "${terminfo[kcud1]}" down-line-or-search    # start typing + [Down-Arrow] - fuzzy find history backward
 
-bindkey '^[[Z' reverse-menu-complete
+bindkey "${terminfo[khome]}" beginning-of-line      # [Home] - Go to beginning of line
+bindkey "${terminfo[kend]}"  end-of-line            # [End] - Go to end of line
 
-# Make the delete key (or Fn + Delete on the Mac) work instead of outputting a ~
-bindkey '^?' backward-delete-char
-bindkey "^[[3~" delete-char
-bindkey "^[3;5~" delete-char
-bindkey "\e[3~" delete-char
+bindkey ' ' magic-space                             # [Space] - do history expansion
+
+bindkey '^[[1;5C' forward-word                      # [Ctrl-RightArrow] - move forward one word
+bindkey '^[[1;5D' backward-word                     # [Ctrl-LeftArrow] - move backward one word
+
+bindkey "${terminfo[kcbt]}" reverse-menu-complete   # [Shift-Tab] - move through the completion menu backwards
+
+bindkey '^?' backward-delete-char                   # [Backspace] - delete backward
+bindkey "${terminfo[kdch1]}" delete-char            # [Delete] - delete forward
 
 # Edit the current command line in $EDITOR
 autoload -U edit-command-line