This control is intended to limit the use of certain kinds of “binary or machine executable” software when “the Government does not have access to the original source code”.
As clarified in the 2009 Do D CIO Memorandum, this control does not prohibit the use of open source software, since with open source software the government does have access to the original source code.
Most OSS projects have a “trusted repository”, that is, some (web) location where people can get the “official” version of the program, as well as related information (documentation, bug report system, mailing lists, etc.).
Users can get their software directly from the trusted repository, or get it through distributors who acquire it (and provide additional value such as integration with other components, testing, special configuration, support, and so on).
References to specific products or organizations are for information only, and do not constitute an endorsement of the product/company.
A collaborative version of this document is published in Intellipedia-U at https:// The 16 October 2009 memorandum from the Do D CIO, "Clarifying Guidance Regarding Open Source Software (OSS)" defines OSS as "software for which the human-readable source code is available for use, study, re-use, modification, enhancement, and re-distribution by the users of that software".
All other developers can make changes to their local copies, and even post their versions to the Internet (a process made especially easy by distributed software configuration management tools), but they must submit their changes to a trusted developer to get their changes into the trusted repository.
Users can send bug reports to the distributor or trusted repository, just as they could for a proprietary program.
"Open source software" is also called "Free software", "libre software", "Free/open source software (FOSS or F/OSS)", and "Free/Libre/Open Source Software (FLOSS)".
The term "Free software" predates the term "open source software", but the term "Free software" has been sometimes misinterpreted as meaning "no cost", which is not the intended meaning in this context.