[u]

[..]
  1. u_char
  2. u_int
  3. u_long
  4. u_short
  5. uncompress
  6. unexpected_eof
  7. ungetpath
  8. unknown_preprocessing_directive
  9. unknown_yacc_directive
  10. unload_filemap
  11. unload_gpath
  12. unput
  13. update
  14. updatetags
  15. upperdir
  16. usable
  17. usage
[..]