O
OASIS - Organization for the Advancement of Structured Information Standards (organization working on the development of E-business standards in areas such as Web services)
OMA - Open Mobile Alliance (group working on standards for mobile communications and computing devices)
OPA - Online Privacy Alliance (organization of companies dedicated to protecting online privacy and setting standards for members)
OPA - Open Patent Alliance (group of companies formed in 2008 to promote development of WIMAX (Worldwide Interoperability for microwave access) Internet use)
OSSTM - Open Source Security Testing Methodology (framework/standard developed by the Institute for Security and Open Methodologies (ISECOM) to help organizations improve security)
OSSTMM - Open Source Security Testing Methodology Manual (downloadable manual providing a methodology and standards for systems security testing)
OWASP - Open Web Application Security Project (organization focused on developing information on security vulnerabilities and solutions related to web servers and applications)