In April 2005, Tridgell tried to produce free software ( now known as SourcePuller ) that interoperated with the BitKeeper source code repository.

" Apple reportedly obtained an eight-year license for Applesoft BASIC from Microsoft for a flat fee of $ 21, 000, renewing it in 1985 through an arrangement that gave Microsoft the rights and source code for Apple's Macintosh version of BASIC.

In developing AIX, IBM and Interactive Systems Corporation ( whom IBM contracted ) also incorporated source code from 4. 2 and 4. 3 BSD UNIX.

In 2003, the SCO Group alleged that ( among other infractions ) IBM had misappropriated licensed source code from UNIX System V Release 4 for incorporation into AIX ; SCO subsequently withdrew IBM's license to develop and distribute AIX.

The source code for 13 games, as well as the OS and development tools ( for the Atari ST computer system ) were discovered in a dumpster behind the Atari building in Sunnyvale, California.

Commented assembly language source code was made available for Centipede, Commando, Crossbow, Desert Falcon, Dig Dug, Food Fight, Galaga, Hat Trick, Joust, Ms. Pac-Man, Super Stunt Cycle, Robotron: 2084 and Xevious game titles.

New tools, documentation, source code and utilities for development have since been created which has sponsored additional homebrew development.

The source code to AMOS has since been released under a BSD style license by Clickteam-a company that includes the original programmer.

Some popular freeware BBS programs for MS-DOS included Telegard BBS and Renegade BBS, which both had early origins from leaked WWIV BBS source code.

How to design and implement a stripped-down version of an interpreter for the BASIC language was covered in articles by Allison in the first three quarterly issues of the People's Computer Company newsletter published in 1975 and implementations with source code published in Dr. Dobb's Journal of Tiny BASIC Calisthenics & Orthodontia: Running Light without Overbyte.

As the popularity of BASIC grew in this period, magazines ( such as Creative Computing in the US ) published complete source code in BASIC for games, utilities, and other programs.

BCPL was the first brace programming language, and the braces survived the syntactical changes and have become a common means of denoting program source code statements.

The enhanced assembler's source program was then assembled by its predecessor's executable ( A1 ) into binary or decimal code to give A2, and the cycle repeated ( now with those enhancements available ), until the entire instruction set was coded, branch addresses were automatically calculated, and other conveniences ( such as conditional assembly, macros, optimisations, etc.

* Code browser, for navigating source code

Source compatibility requires recompilation but no changes to the source code.

The product ships with complete source code, build script, test suite, and documentation.

The code quality and general utility along with the licensing terms have led to its use in a multitude of free and open source software.

* Source Navigator and Source Navigator NG-A source code analysis and exploration tool

This license is a 2-clause BSD license with an additional copyleft clause similar to the GNU GPL version 2's Section 3, requiring source code of an application using Berkeley DB to be made available for a nominal fee.

In 1996 Taito announced that they lost the original source code.

The same program in its human-readable source code form, enables a programmer to study and develop the algorithm.

Computer programming in general is the process of writing, testing, debugging, and maintaining the source code and documentation of computer programs.

This source code is written in a programming language, which is an artificial language often more restrictive or demanding than natural languages, but easily translated by the computer.

The process of writing high quality source code requires knowledge of both the application's domain and the computer science domain.

In information theory and computer science, a code is usually considered as an algorithm which uniquely represents symbols from some source alphabet, by encoded strings, which may be in some other target alphabet.

The GPL release of the Quake III engine's source code was moved from the end of 2004 to August 2005 as the engine was still being licensed to commercial customers who would otherwise be concerned over the sudden loss in value of their recent investment.

The QuakeC source to the original id Software Quake game logic was published in 1996 and used as the basis for modifications like capture the flag and others.

The programmers of Quake modifications could then publish their < tt > progs. dat </ tt > bytecode without revealing their source code.

With the Quake engine source code now able to be changed, further features were added to QuakeC in the form of new builtin functions.

* id's public FTP containing the QuakeC source code to Quake version 1. 06 game logic

On August 19, 2005, id Software released the complete source code for Quake III Arena under the GNU General Public License, as they have for most of their prior engines.

Since the source code for Quake was released a number of unofficial ports were made available for PDAs and mobile phones, such as PocketQuake, as well as versions for the Symbian S60 series of mobile phones and Android mobile phones.

The Daikatana team received the source to the Quake II engine in November 1997, and immediately realized that the switch would not be simple.

In December 1999, John Carmack of id Software released the server and client source code of Quake and QuakeWorld under the GNU General Public License as a Christmas present to the world, and this spawned a plethora of 21st century updates to the game.

It also features bits of the Quake source ( used predominantly for networking and rendering ), and was the first port to support Strife.

They also marketed a commercial Amiga port of Quake II, which was already available as source code under the GNU Public License.

Most of source ports are created for old, classic games — for example: Doom, Quake I / II, Strife, Duke Nukem 3D, Rise of the Triad.

On December 21, 1999, John Carmack of id Software released the Quake engine source code on the Internet under the terms of the GPL, allowing programmers to edit the engine and add new features.

QuArK ( aka Quake Army Knife ), is a free and open source program for developing 3D assets for a large variety of video games, mostly first-person shooters using engines similar to or based on the Quake engine by id Software.

Noclip mode is available in numerous open source games based on the GPL Quake source code.

At QuakeCon 2005, John Carmack announced that the Quake III source code would be released under the GNU General Public License ( version 2 ), and it was released on August 19, 2005.

and the actual RoQ decoder is present in the Quake 3 source code release.

ioquake3 is a game engine project which aims to build upon id Software's Quake 3 source code release.

The project was started shortly after the source code release with the goal of creating a bug-free, enhanced open source Quake 3 source code distribution upon which new games and projects can be based.

* Quake III source code ( id Tech 3, idsoftware. com )