[d:commands Appropriate for]   [s:a][program:apropos][args:{keyword}]
[d:Documentation on a program] [s:d][program:man][args:{program}]
[d:Locate a program]           [s:l][program:whereis][args:{program}]
[d:Tutorials on UNIX]          [s:t][program:learn]
[d:which Version of a program] [s:v][program:which][args:{program}]
[d:What is a program for]      [s:w][program:whatis][args:{program}]
