Mark Williams Company
The Mark Williams Company was a small software company in Chicago, Illinois (later moved to Northbrook, Illinois) that created Coherent, one of the first Unix-like operating systems for IBM PCs and several C programming language compilers. It was founded by Robert Swartz in 1980 and discontinued operations in 1995. The name comes from the middle name of Robert Swartz's father, William Mark Swartz.
Mark Williams won a patent lawsuit centered around 'byte ordering'. Separately and at that time, Linux had made serious inroads in the UNIX clone market. Being that Coherent was a commercially available package and Linux was distributed freely on the Internet via their GNU public license, Coherent sales plummeted and Swartz had no choice but to cease operations in 1995.
- Produced Coherent, a clone of Unix.
- csd the world's first C source debugger.
- Let's C the first low-cost professional C compiler for the IBM PC.
- Mark Williams C for the Atari ST, first major C programming environment for the ST computers.
- XYBasic, a process control BASIC running on CP/M that could be burned on to memory (EPROM) and run on an 8080 standalone processor.
- Lee, Joseph. "Dr. Enuf: The story of Johnson City Tennessee’s most famous product". Tazewell-Orange.com. Retrieved 2013-03-03. "In 1949 William Mark Swartz, President of Mark Williams Chemical Co. of Chicago, Ill., decided to create a soft drink that would relieve fatigue, headaches, indigestion etc…. He applied for a trademark for the drink on May 19, 1951."
- Sauceman, Fred (2009). The Place Setting: Timeless Tastes of the Mountain South 3. Mercer Univ. Press. pp. 89–97. ISBN 9780881461404. "According to corporate lore, Bill Schwartz [sic], a Chicago chemist, developed the formula after hearing his co-workers complain of lethargy."
- START Vol. 1 No. 3 Mark Williams C & Menu by Arick Anders
- START Vol. 2 No. 2 Mark Williams C 2.0 by Arick Anderson
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