Expanded user base through cross platform compatability: AmigaOS (m68k), AmigaOS 4 (PowerPC), AROS (x86, PowerPC, m68k), MorphOS (PowerPC) BSD, very cross platform (see NetBSD, for example) Java Linux (x86, x86-64, PowerPC, and other architectures) Mac OS X (PowerPC, x86, x86-64) Microsoft Windows (x86, x86-64) MS-DOS and compatibles on the x86: MS-DOS, DR-DOS, FreeDOS, etc. OS/2, eComStation Solaris (SPARC, x86, x86-64) The CLI, also known by the implementation names .NET Framework (from Microsoft) and Mono (from Novell)