Version 1.5 was released several months later for Windows NT, with support for basic table rendering, an important early web standard. Microsoft originally released Internet Explorer 1.0 in August 1995 in two packages: at retail in Microsoft Plus! add-on for Windows 95 and via the simultaneous OEM release of Windows 95. The browser was then modified and released as Internet Explorer. The license to Microsoft provided Spyglass (and thus NCSA) with a quarterly fee plus a percentage of Microsoft's revenues for the software. Internet Explorer was initially built using the Spyglass, not the NCSA source code. Spyglass in turn delivered two versions of the Mosaic browser to Microsoft, one wholly based on the NCSA source code, and another engineered from scratch but conceptually modeled on the NCSA browser. The original Mosaic came from NCSA, but since NCSA was a public entity it relied on Spyglass as its commercial licensing partner. The first Internet Explorer was derived from Spyglass Mosaic. 6.1 Desktop market share by year and versionīeginnings and Spyglass Mosaic (1995–1997).5 Windows 10 and Microsoft Edge (2014–present).3 Hiatus and security troubles (2003–2006).1 Beginnings and Spyglass Mosaic (1995–1997).