Original sentence: Many companies (like E-Trade and Google) chose to build Web applications based on large numbers of the less expensive PC-class x86-architecture servers running Gnu/Linux, rather than a smaller number of high-end Sun servers.Sun responded to this in several ways, including introducing its own lines of PC-class servers to compete directly in that market, re-launching development of Solaris on the x86 platform and releasing the open-source OpenSolaris to drive interest in using Solaris, and coming out with lower cost horizontally-scaled SPARC systems (see below)
Edited sentence: Many companies (like E-Trade and Google) chose to build Web applications based on large numbers of the less expensive PC-class x86-architecture servers running GNU/Linux, rather than a smaller number of high-end Sun servers.Sun responded to this in several ways, including introducing its own lines of x86-based servers to compete directly in that market, re-launching development of Solaris on the x86 platform and releasing the open-source OpenSolaris to drive interest in using Solaris, and coming out with lower cost horizontally-scaled SPARC systems (see below)