Don, Reed. Apple III SOS Reference Manual (PDF). 1. Apple Computer, Inc., 1982 [Consulta: 28 octubre 2009]. «This manual describes SOS (pronounced "sauce") the Sophisticated Operating System of the Apple III.»
Weyhrich, Steven. «Còpia arxivada». Apple II History, 07-07-2001. Arxivat de l'original el 17 de setembre 2008. [Consulta: 28 desembre 2020]. «The operating system designed for the Apple III computer was called "SOS". This title arose from the Apple III's code name, "Sara", which itself came from the name of the daughter of engineer Wendell Sanders.»
InfoWorld Media Group, Inc.. InfoWorld. InfoWorld Media Group, Inc., 16 febrer 1981, p. 9–. ISSN 01996649.
web.archive.org
Weyhrich, Steven. «Còpia arxivada». Apple II History, 07-07-2001. Arxivat de l'original el 17 de setembre 2008. [Consulta: 28 desembre 2020]. «The operating system designed for the Apple III computer was called "SOS". This title arose from the Apple III's code name, "Sara", which itself came from the name of the daughter of engineer Wendell Sanders.»