SAS, Pascal, PL/I, C, COBOL, BASIC, APL, FORTRAN, Prolog, and assembly languages: 8088/86, TI-990, Z80/8080, TI-960, Interdata H/16 (Harris 1600), and S/360.
IBM MVS (SP, XA and ESA), PC/MS-DOS, MS Windows (3.1 and NT), Unix, CP/M, UCSD p-System, DX10/DNOS (TI-990), North Star DOS, PAMD/DXS (TI-960), HP System 2000, and Harris DOS.
Performance Modeling (Simulation and Queuing Theory), Application Analysis, Performance Analysis, Capacity Planning, Mainframe Batch systems, Mainframe On-line systems (IMS, CICS, ISPF, DXS, DNOS), System design, Project Management, Programming (Mainframe and PC), Teaching, Applications Development (Mainframe and PC), Hardware Configuration (Mainframe and PC), Storage Management, Database Systems, and Operating System Support.