<P> Release to the web (RTW) or web release is a means of software delivery that utilizes the Internet for distribution . No physical media are produced in this type of release mechanism by the manufacturer . Web releases are becoming more common as Internet usage grows . </P> <P> During its supported lifetime, software is sometimes subjected to service releases, patches or service packs, sometimes also called "interim releases". For example, Microsoft released three major service packs for the 32 - bit editions of Windows XP and two service packs for the 64 - bit editions . Such service releases contain a collection of updates, fixes, and enhancements, delivered in the form of a single installable package . They may also implement new features . Some software is released with the expectation of regular support . Classes of software that generally involve protracted support as the norm include anti-virus suites and massively multiplayer online games . A good example of a game that utilizes this process is Minecraft, an indie game developed by Mojang, which features regular "updates" featuring new content and bug fixes . </P> <P> When software is no longer sold or supported, the product is said to have reached end - of - life, to be discontinued, retired, or obsolete, but user loyalty may continue its existence for some time, even long after its platform is obsolete--e.g., the Atari ST and Sinclair ZX Spectrum . </P>

Which of the following is the final stage of the program development life cycle