Open source makes the technology world go ’round, forming as much as 90% of the modern software stack via frameworks; libraries; databases; operating systems; and countless stand-alone applications.

It says it is, but the reality is a little blurry.

Arguments about what is and isn’t “open source” are often resolved by deferring to the Open Source Initiative (OSI): If a piece of software is available under a license rubber stamped as “open source” ...

Redis, the company behind the popular value-key database of the same name, has returned its main system to an open source license, although the move failed to satisfy some critics.… Adding the GNU ...

Some software developers disagree with the open-source community on licensing and compliance issues, arguing that the community needs to redefine what constitutes free open-source code. The term “open ...