Eric S. Raymond

Eric Steven Raymond (born December 4, 1957), often referred to as ESR, is an American software developer, open-source software advocate, and author of the 1997 essay and 1999 book ''The Cathedral and the Bazaar''. He wrote a guidebook for the Roguelike game ''NetHack''. In the 1990s, he edited and updated the Jargon File, published as ''The New Hacker's Dictionary''. Provided by Wikipedia