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- Bo Jangeborg - Sinclair ZX Spectrum games
- Paul Jardetzky - author of server program for the first webcam
- Lynne Jolitz - 386BSD
- William Jolitz - 386BSD
- Stephen C. Johnson - yacc
- Bill Joy - BSD, csh, vi, co-founder of Sun Microsystems
- Robert K. Jung - creator of ARJ
Read more about this topic: List Of Programmers