A keymap maps keys typed by the user to commands. This mapping controls how the user's command input is executed.
NOTE: In SXEmacs, a keymap is a separate primitive type. In FSF GNU
Emacs, a keymap is actually a list whose car is the symbol
keymap.
See Keymaps, for information about creating keymaps, handling prefix keys, local as well as global keymaps, and changing key bindings.