Complex sentence: In 1993,4D Server, the client/server version of 4th Dimension was introduced and since 1995,4D has supported both the Microsoft Windows and Apple Macintosh operating systems.
Split into simpler sentences: In 1993,4D Server, the client/server version of 4th Dimension was introduced. In 1995,4D went cross-platform and has since then supported both the Microsoft Windows and Apple Macintosh operating systems.