Major Section: MISCELLANEOUS :max ; the command most recently
typed by the user :x ; synonymous with :max (:x -1) ; the
command before the most recent one (:x -2) ; the command before
that :x-2 ; synonymous with (:x -2) 5 ; the fifth command typed
by the user 1 ; the first command typed by the user 0 ; the last
command of the system initialization -1 ; the next-to-last
initialization command :min ; the first command of the
initialization :start ; the last command of the initial ACL2
logical world fn ; the command that introduced the logical name
fn (:search (defmacro foo-bar)) ; the first command encountered
in a search from :max to ; 0 that either contains defmacro and
foo-bar in the ; command form or contains defmacro and foo-bar
in some ; event within its block. The recorded history of your
interactions with the top-level ACL2 command loop is marked by
the commands you typed that changed the logical world. Each such
command generated one or more events, since the only way for you
to change the logical worl