Complex sentence: While Novell NetWare is still used by organizations, especially in education and government, its ongoing decline in popularity began in the mid- 1990's, when NetWare was the de facto standard for file and print service software for the Intel x86-compatible server platform.
Split into simpler sentences: While Novell NetWare is still used by many organizations, especially in education and government, its sharp decline in popularity has been ongoing since the mid- 1990's. At that time, NetWare was considered the de facto standard for file and print service software for the Intel x86-compatible server platform.