Emacs automatically loads Lisp libraries when a Lisp program requests a function or a variable from those libraries. This is called `autoloading'. See section V.7 Libraries of Lisp Code for Emacs.

Any of a variety of arms which upon being manually loaded and fired, will eject the fired case, load the next cartridge from the magazine and cock the gun ready for refiring. Pressure on the trigger must be released and reapplied after each shot for the next shot to fire. Gas expansion, recoil and mechanical spring action are used to perform ejection and reloading operations. Also called semi-automatic or self-loading.