square tape

square tape

(storage)
Mainframe magnetic tape cartridges for use with IBM 3480 or compatible tape drives; or QIC tapes used on workstations and microcomputers. The term comes from the square (actually rectangular) shape of the cartridges; contrast round tape.
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References in periodicals archive ?
For example, round reel 3420-type drives present in 1974 were replaced starting in 1984 by square tape made with chromium dioxide magnetic particles.
DLT (then in the DEC world) has its heritage from the mainframe "3480 square tape".