A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P–Q | R | S | T | U | V | W | X–Z

open source
Open source describes software whose underlying foundation (its source code) is available to the public. All users can view, alter, and redistribute open-source software so long as they abide the conditions set out by the license under which it is distributed.