In May 1994, Spyglass licensed NCSA's Mosaic browser for several million dollars, with the intent to develop their own Web browser. However, NCSA's development effort had resulted in different features, user interfaces, and codebases for each of its major platforms:
UNIX,
Microsoft Windows, and
classic Mac OS. Spyglass therefore created its own Mosaic codebase in which most source code and all features were shared between platforms. Spyglass offered a 30-day trial version for download, but did not actually sell the product to end-users. Instead, it licensed the code to re-sellers that delivered either an unmodified Spyglass Mosaic (e.g.,
O'Reilly and Associates) or a browser based on the Spyglass codebase (as
CompuServe,
IBM and
Ipswitch) did. Among the browsers produced under license using Spyglass Mosaic's codebase was
Microsoft's
Internet Explorer. In addition to the major desktop platforms, Spyglass ported Mosaic to other systems including
Nintendo 64 for the
SharkWire Online system.
Browser wars Netscape Communications Corporation, co-founded by
Marc Andreessen, released its flagship
Netscape Navigator browser in October 1994, and the company soon became the web browser industry leader. Microsoft recognized the potential of the web, and after the company lost out to
AOL for
BookLink's browser in November 1994, Microsoft reached a licensing deal with Spyglass in January 1995. Spyglass' Mosaic code became the basis for Internet Explorer, which was released as an add-on to
Windows 95 in the
Microsoft Plus! software package.
Internet Explorer 6 and older acknowledged Spyglass and NCSA Mosaic in the 'About' panel, but the message was removed starting with
Internet Explorer 7 in 2006. ==Web server technology==