The BSD License, also known as the Berkeley Source Distribution license, is a low-restriction FOSS (Free and Open Source Software) family of licenses that allows for the distribution of open source, freeware, and shareware projects without any restrictions on redistribution. It originated from the University of California, Berkeley's operating system based on UNIX, which was widely adopted by workstation vendors in the 1980s. The license has undergone changes over time, with a new version replacing the original 4-Clause BSD License due to controversy surrounding its advertising clause. The current New BSD License (or 3-Clause BSD License) requires users to retain copyright notices and disclaimers on all redistributions, reproduce them on documentation, and not use the organization's name to endorse products without permission. The license is classified as a permissive license, which places minimal restrictions on how users can modify, use, or redistribute the source code, making it popular among teams with specific goals in mind. It can be used commercially, and its benefits include allowing for flexible development environments and no additional licensing fees required. Various software projects, including FreeBSD, DragonFly BSD, Google's Bionic, and Darwin, are released under a BSD license, which is the sixth most popular license on Github.