IBM Portable PC, model number 5100; First introduced: September, 1975;  CPU: IBM proprietary, 1.9MHz;  RAM: 16K, 64K max;  Display: 5″ monochrome monitor 64 X 16 text;  Storage: Internal 200K tape (DC300);  Ports: tape / printer I/O port;  OS: APL and/or BASIC.
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