This will iterate over the attached devices, displaying a short
description of each.

~~~
:id
  #0 [ 'generic-output s:put nl ] case
  #1 [ 'generic-input s:put nl ] case
  #2 [ 'floating-point s:put nl ] case
  #3 [ 'block-store s:put nl ] case
  #4 [ 'filesystem s:put nl ] case
  #5 [ 'clock s:put nl ] case
  #6 [ 'reserved s:put nl ] case
  #7 [ 'sockets s:put nl ] case
  #8 [ 'unix-syscalls s:put nl ] case
  #9 [ 'scripting s:put nl ] case
  #10 [ 'random-number-generator s:put nl ] case
  #1000 [ 'saving-image s:put nl ] case
  'unknown:_ s:put n:put nl ;

'Detecting_devices... s:put nl
io:enumerate [ $# c:put I dup n:put io:query nip tab id ] indexed-times
'Complete. s:put nl
~~~