54 books • 2 series
Book #232: A Concise Introduction to M. S.-DOS
Book #243: B. B. C. BASIC 86 on the Amstrad PC's and I.B.M.Compatibles
Book #250: Programming in Fortran 77
Book #260: A Concise Introduction to OS/2 Data Base Management
Book #264: A Concise Advanced User's Guide to M. S.-DOS