what is a vse
z/VSE (Virtual Storage Extended) is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965.It is less common than prominent z/OS and is mostly used on smaller machines. Primary z/VSE development occurs in IBM's Boeblingen bÃ¶blingen labs In. germanyhe last VSE/ESA release-VSE/ESA 2.7 - is no longer supported since February 28, 2007. z/VSE 3.1 was the last release, that was compatible with 31-bit mainframes, as opposed to z/VSE Version 4 and 5.