later input from Jeff Polk and many other contributors. Brian Berliner wrote a paper introducing his improvements to the CVS program—which describes how the tool was extended and used internally by Prisma, a third-party developer working on the SunOS kernel, and was released for the benefit of the community under the GPL. On November 19, 1990, CVS version 1.0 was submitted to the Free Software Foundation for development and distribution. The latest version was released on 8 May 2008. Adoption and successors Over time, developers have created new version control systems based on CVS in order to add features, alter the operational model, and improve developers' productivity. CVS replacement projects include CVSNT and Subversion. See also Comparison of version-control software Cervisia OpenGrok StatCVS TortoiseCVS ViewVC Notes References External links Version Management with CVS: manual for CVS 1.12.13, by Per Cederqvist et al. 1990 software Free software programmed in C Free version control software Software using the GPL license Unix archivers and compression-related utilities