IBM 3420 with IBM 3480 model B22

IBM 3420 with IBM 3480 model B22

IBM 3420 with IBM 3480 model B22
Dramatic changes in size -- half the floor space -- and capability are vividly seen in this view of design models for the IBM 3420 Magnetic Tape Subsystem of 1970 (background) and the newer IBM 3480 (Model B22) of 1984 (foreground). The 3420 used 10.5-inch round tape reels that stored 160MB of data; the 3480 used a 5.5-inch square cartridge that stored up to 200MB of data.