Within most applications, the primary way for a user to request help is by pressing the help key. In recent years, the F1 function key has become a defacto standard help key for many workstation and personal computer products.
The CDE Style Guide and Certification Checklist recommends the use of F1 as the help key, and the OSF/Motif programmer's toolkit even provides some built-in behavior to make it easier to implement the help key in OSF/Motif applications.
Some computers provide a Help key on the keyboard.