de facto standard

Definitions

Commerce

Computing

  • noun a design, method, or system which is so widely used that it has become a standard but has not been officially recognised by any committee

Electronics

  • A standard adopted through continued use and acceptance, as opposed to being issued or endorsed by a standards entity. Examples include PCL, PDF, and RSA. This contrasts with de jure standard.
http://www.dictionarycentral.com/definition/de-facto-standard.html