To quit from your Unix login,  left click the "EXIT"  button on your control bar.  You will then be prompted to hit "OK"  to verify log out.

IMPORTANT:  Please make sure that you have not left any processes running on your machine when you log off (See 'Killing Unwanted Processes' above). It's OK to leave things like your clock, calendar,  mailtool, and command tools running. Processes like Arc, Netscape, Imagine, and Text Editors, however, must be properly exited before you log off the system.