One good way to find information about particular programs or commands on
Athena is to read the manual pages with the "man" command.  Type:

	man program

at your athena% prompt, where program is the name of the command you are
curious about.  For example,

	man zwrite

tells you how the zwrite command works, what arguments it accepts, and some
known bugs.

Another good tool is the apropos command.  If you type

	apropos keyword

a list of all man pages that contain keyword in their name field will be
returned.  For example, if you type

	apropos zwrite

You'll get this output:

  xzwrite (1)             - X application to write to another user via Zephyr
  zwrite (1)              - write to another user via Zephyr
  xzwrite (1)          - X application to write to another user via Zephyr

You can then use man to view the manual page for the specific command you
want.  You can also type

	man man

to get more information on how man works.