TY  - BOOK
T1  - IBM disk operating system, version 4.0.
LA  - English
PP  - Quezon City
PB  - Perfect Bound Pub.
YR  - 1988
UL  - https://tuklas.up.edu.ph/Record/UP-1685594773857424194
OP  - 320
NO  - "Reprinted under authority of Presidential Decree No. 285 as amended by PD Nos. 400 & 1203."--T.p. verso
CN  - QA 76.8 I12594 I35 1988
KW  - IBM Personal Computer : Programming.
ER  -