This release was a mixture of a 32 bit kernel, supporting 32 bit device drivers, and 16-bit Windows for the upper OS layers. Windows 3.1 ( 16-bit) with enhanced networking designed to work particularly well as a client with the new Windows NT. Portmanteau of Janus and Astro, the codename of MS-DOS 6. Janus is a Roman god usually depicted with two faces, here symbolizing the previously separate Windows and MS-DOS products.Ĭombined bundle of Windows 3.1 and MS-DOS 6. Operating systems Windows 3.x and 9x CodenameĬombined bundle of Windows 3.1 and MS-DOS 5. There has been some suggestion that Microsoft may move towards defining the real name of their upcoming products earlier in the product development lifecycle to avoid needing product codenames. It is not uncommon for Microsoft to reuse codenames a few years after a previous usage has been abandoned. Microsoft usually does not announce a final name until shortly before the product is publicly available. Many of these products (new versions of Windows in particular) are of major significance to the IT community, and so the terms are often widely used in discussions before the official release. Microsoft codenames are given by Microsoft to products it has in development before these products are given the names by which they appear on store shelves.