The computer system 12 wherein said cartridge includes a recess and wherein said {HEAD ~ holding means} includes {TAIL ~ a lever} having an end which hooks into said recess in the cartridge 
includes
The computer system 12 wherein said cartridge includes a recess and wherein said { HEAD ~ holding means } includes { TAIL ~ a lever } having an end which hooks into said recess in the cartridge
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH