(C) 2003, Tim Maher       1-9       www.TeachMePerl.com
Enhancements
.
Deficiencies of Shell's select
no default loop variable
no validation of user input
no headings for menus
no binding of prompts to menus
programmer must reset PS3 every time
no highlighting of prompts
no automatic re-prompting on inner-outer loop transition
no easy way to detect EOF to prompt
   . . . all corrected in Shell::POSIX::Select