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The
IBM 3505 is a reader for 80-column
punched cards.
It can read cards punched in
EBCDIC or
column binary at up to 1200 cards per minute (CPM).
The
IBM 3525 is a multi-function punched card device, capable of reading, punching, and printing on punched cards.
The 3505 contains an integrated control unit that attaches to a
System/370 byte multiplexer, selector, or block multiplexer
channel.
An optional feature of the 3505 allows the control unit to also control a 3525, although the two are separately-addressed devices
The 3505/3525 units attach to a System/370 Model 135 and up, or to a System/360 Model 195
The 3505 and 3725 were developed at the IBM General Systems Division in
Rochester, Minnesota in 1971