WordNet (r) 3.0 (2006):

autoloader
    n 1: a firearm that reloads itself [syn: autoloader, self-
         loader]

The Free On-line Dictionary of Computing (30 December 2018):

stack loader
autoloader

    (Or "autoloader") A magnetic tape drive
   that can automatically fetch tapes from a stack and load them.

   Compare jukebox.

   [Sequential or random access?]

   (1996-12-12)