00493nam a2200157 a 450000500170000000800410001710000170005824500650007526000340014030000340017444000300020850000340023865000410027285200110031385200110032420190520020611.0090327s19uu    xx            00    eng d10aHock, Seth A10aUnderstanding and using PFS :bfirst choice /cSeth A. Hock.0 aSt. Paul :bWest Pub,cc1989.  a1 v. (various pagings) : ill. 0aThe microcomputing series  aIncludes appendices and index  aPFS, First choice (Computer program)  7OLOPSC  7OLOPSC