TY  - BOOK
AU  - DUFFY, Tim
TI  - Four software tools
U1  - 001.642 5 D85F 
PY  - 1987///
PB  - Belmont
KW  - BUSINESS -- COMPUTER PROGRAMS
KW  - MS DOS (COMPUTER PROGRAM)
KW  - PC DOS (COMPUTER PROGRAM)
ER  -