Open source

See:

• Open source software. This is essentially the same as free software ("free as in freedom") but the different terms reflect a different philosophy and emphasis. For a nice summary of where open source stands in a range of applications see Open source won
• Open Source Appropriate Technology (OSAT)
• Open source engineering software
• Open-sustainability
• Open source patents
• Open source rapid prototyping of OSAT
• Open source technology

Compare and contrast with the more restricted

• Open access
• Non-commercial licenses vs open licenses

"Basically Open Source technology is the only way we'll end up as citizens in this technological world, rather than as serfs." - Vik Oliver, 2018 [1]