FOSS

Definitions

1. Free and Open Source Software — an umbrella term covering both the Free Software Foundation's ethically motivated 'free software' and the more pragmatically branded 'open source.' Using FOSS lets you avoid the holy war about which philosophy is correct.

   In plain English: Software that is both free to use and has publicly available source code — covering both ideological camps of the open software movement.

2. The philosophical split: 'Free Software' (FSF, Stallman) emphasizes user freedom as a moral imperative. 'Open Source' (OSI, Raymond) emphasizes practical benefits — better code, faster development, wider adoption. FOSS papers over this genuine ideological divide with a convenient acronym.

   Example: 'He calls it Free Software; she calls it Open Source; the license file calls it MIT. They're both right and they'll both argue about it forever.'

   Source: philosophical split

Etymology

1983

Richard Stallman announces the GNU Project, planting the seed for what will become 'free software'

1998

The term 'open source' is coined at a Netscape strategy session; FOSS (Free and Open Source Software) bridges the two camps

2020s

FOSS underpins virtually all technology — 96% of codebases contain open-source components, according to Synopsys audits

Related Terms

• Open Source
• GPL
• MIT License
• Copyleft
• Apache License
• Community Edition
• Contributor Guide
• F-Droid
• FLOSS
• LibreOffice
• Patch Review
• Project Health
• README Convention
• Sponsorship
• GNU Manifesto
• Tesseract OCR
• API Specification Standard
• Autotools
• CNCF
• Erlang OTP
• K3s