Matisse.net hosts a list of Unix commands unique to Mac OS X/Darwin. You'll find a lot of good stuff in that list that you might not have been aware of. These are ...

Unix was developed as a command line interface in the early 1970s with a very rich command vocabulary. DOS followed more than a decade later for the IBM PC, and DOS commands migrated to Windows.

Microsoft’s Services for Unix 3.5 (SFU 3.5) helps bridge the gap between Windows and Unix/Linux by “fooling” Unix/Linux systems into thinking they’re just another NIS server. SFU can also perform ...

The 'sudo' keyword in Unix and Linux allows users to execute certain commands with special-access privileges that cannot otherwise run on a given machine by a user with a lower level of clearance.