The Conquest Of Code
In June 1976, Li-Chen Wang published a new version of Tiny BASIC, making it free to copy for all hobbyists in the Homebrew Computer Club, including Bill Gates. The license text of that Tiny BASIC for the Altair was "©Copyleft–All Wrongs Reserved", one of the earliest examples of the real struggle felt by early practicioners trying to understand how to distribute software properly, legally, and maybe even, profitably.
A developer’s guide to the most common open-source licenses (MIT, Apache 2.0, BSD)
An almost comprehensive guide about what kind of licenses to choose when creating a new open-source project: MIT or Apache 2.0 or BSD