About
Eric Steven Raymond, often known as ESR, is an American software developer and prominent advocate for open-source software. He is the author of the influential essay and book "The Cathedral and the Bazaar," which explores different software development models. Raymond also contributed to the open-source community by writing a guidebook for the game NetHack and editing and updating the Jargon File, published as "The New Hacker's Dictionary." His work has had a considerable impact on the development and philosophy of open-source software.
Career Timeline
Maintains NetHack Guidebook
Early contributions to open-source community and gaming culture.
The Jargon File Editor
Takes on responsibilities to maintain the 'Hacker's Dictionary'.
The Cathedral and the Bazaar
Publishes influential essay on open-source development models.
Open Source Advocate
Becomes a prominent spokesperson and advocate for the open-source movement.
Controversial Views
Raymond's strong opinions and outspokenness sometimes generate criticism.
Influential Open-Source Voice
Continues to engage in discussions and debates within the open-source community.
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Last updated: February 21, 2026