Picture of George Gesslein II
George Gesslein II
P.O. Box 224
Lansing, New York 14882-0224
email: gesslein@mathomatic.org
web site: www.mathomatic.org

Software developer with 25 years of C programming experience. Interested in computers, free software, and mathematics. Currently severely disabled by multiple illnesses.


A total of 7 years of professional, full-time, computer programming experience:

Employed full-time by Odyssey Research Associates, Inc. of Ithaca, New York (from February, 1985 to June, 1986) as a software engineer and system administrator.

Employed full-time by Henry, Sheive, and Associates of Ithaca, New York (from September, 1983 to December, 1984) as a programmer writing programs to be compiled with the Pascal/MT+ compiler.

First job was at Ithaca Intersystems (from June, 1979 to June, 1983), employed full-time as a hardware technician with circuit board assembly experience and later as a programmer for their computer products. Their most exciting product was the DPS-8000 mainframe, which was a Z-8000 CPU running the insecure Coherent operating system at first, then later the Xenix operating system, which supported the internal Z-8000 memory manager and some security, and was actually Unix. The Z-8000 downfall was the limited 64 kilobyte address space for program data and another 64 kilobytes maximum for code for each user program, requiring overlays for any large program; this limitation was built into the Z-8000 memory management unit and could not be changed.

Currently doing volunteer community service (from July, 1986 to present) to write "Mathomatic", which is an easy to use, free and open source, general-purpose computer algebra system written in C.

Also consulted and contracted to write programs in C and assembly language for the following United States companies, to their specifications: