TY  - BOOK
ED  - International Business Machines Corporation.
TI  - Introduction to IBM data processing systems: student text
PY  - 1977///
CY  - Poughkeepsie, N. Y.
PB  - International Business Machines
KW  - Computers
KW  - Electronic data processing
N1  - 'This edition is a major revision of, and obsoletes all previous editions of GC20-1684. It is intended as a partial update of the previous edition (GC20-1684-3)'
ER  -