autoloader

Noun

 * 1)  A mechanical device that loads ordnance into weapons such as tanks and artillery that would otherwise be loaded by a dedicated crew.
 * 2)  A mechanical device that automatically loads storage media (such as tapes or disks) into the device that can read them.
 * 3)  A software mechanism that automatically locates and loads classes etc. as required at run time.
 * 4)  A semi-automatic firearm.