Are “non-commercial software”, “freeware”, or “shareware” the same thing as open source software?
No. Do not mistakenly use the term “non-commercial software” as a synonym for “open source software”. As noted above, in nearly all cases, open source software is considered “commercial software” by U.S. law, the FAR, and the DFARS. DFARS 252.227-7014 specifically defines “commercial computer software” in a way that includes nearly all OSS, and defines “noncommercial computer software” as software that does not qualify as “commercial computer software”. In addition, important open source software is typically supported by one or more commercial firms. Also, do not use the terms “freeware” or “shareware” as a synonym for “open source software”. DoD Instruction 8500.2, “Information Assurance (IA) Implementation”, Enclosure 4, control DCPD-1, states that these terms apply to software where “the Government does not have access to the original source code”. The government does have access to the original source code of open source software, so these terms do not apply.