Operating systems (Computers) 35 Microsoft Windows (Computer file) 8 Linux 4 MS-DOS (Computer file) 3 Microsoft Windows NT 3 Microsoft Windows server 3 PC-DOS (Computer file) 3 more ... Client/server computing 2 Computer networks 2 TCP/IP (Computer network protocol) 2 Certification 1 Communication in engineering 1 Computer input-output equipment 1 Computer security 1 Computer terminals -- 1 Electronic data processing personnel -- 1 Embedded Internet devices 1 Free computer software 1 FreeBSD 1 IBM Personal Computer -- 1 Local area networks (Computer networks) -- 1 MS-DOS (Computer operating system) 1 Mac OS 1 Macintosh (Computer) 1 Management 1 Microsoft Windows NT Server 1 Microsoft foundation class library 1 NetWare 1 NewWare 1 Operating systems (Computers) -- 1 less ...