Definition: The term "Win95_98" refers to an operating system that was introduced in 1994. It is known as Windows 3.1. This version of Windows was the first production release of Windows, which eventually became Windows XP and Windows 7. In its simplest form, "Win95_98" describes a software version that has been widely released by Microsoft between November 27, 1994 and October 13, 1996. This software was part of the Microsoft Operating System (MSO), which was an upgrade to Windows 3.0 that became officially known as Windows. The term is often used in reference to a version of Microsoft's operating system released prior to Windows 7, specifically, Win95_98 or later versions.