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System 53 Inc.'s technical staff has worked on all the major hardware platforms and operating systems:

bulletPC's from 8086 (8 bit) on up, MS-DOS, Windows 3.1, Windows 95/98/NT/2000, Unix, and NT and Novell LANs.  We work with a plethora of software, development aids, languages, and communication tools, etc., etc., etc.

bulletTandem Guardian Non-Stop utilizing Pathway, TACL, Pathmaker, DDL, etc., etc., etc.

bulletIBM (and compatible) Mainframe, from DOS (Power) through MVS/ES as well as mid-range.   We're expert in JCL, CICS (Command and Macro), all the utilities, DASD (VSAM, ISAM, etc.), etc., etc., etc.
bulletWang VS (though not lately).

Skills Platforms Languages

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