DOS
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Single-tasking operating system
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Windows
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Multi-tasking, single-user. Capable of networking and resource sharing. Used NETBEUI
protocol prior to Windows 2000; largely uses TCP/IP today
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MacOS
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Multi-tasking, single-user, excels at network-based resource sharing. Used AppleTalk
protocol prior to TCP/IP support; Linux-based since OS X.
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Novell NetWare
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Network operating system used for resource sharing; supports Windows and Mac clients.
Dominate NOS in the 1990s using IPX protocol; Linux-based since NetWare v5 using
TCP/IP.
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Unix
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Multi-tasking, single- or multi-user OS. Predominant server OS on Internet servers;
has always used TCP/IP.
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Linux
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Open-source, lightweight version of UNIX; many variants. Excellent OS for resource
sharing, uses TCP/IP
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