UnixWare is a very modular OS. You can install everything if you want or you can install just what you really want to use. If you miss of any packages at the first installation, you can always add them later (either from the GUI or the command line). Likewise, you can always remove packages you don't need.
These packages are typically bundled into sets - for example, the networking set might contain TCP/IP, NFS, NIS etc etc.
Note that the packages are highly controlled. For example, if you suspect that something has been altered on your machine, you can verify your machine against a database of what should be installed (file sizes, checksums, time stamps etc).
Also, there is dependency checks - so, for example, you can't select NFS without TCP/IP.
Note also, that some of the package names have changed between UnixWare 1 and UnixWare 2 (such as the network hardware card support).
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