The operating system
It makes his Dagobah faster.
A corny poop joke. You can really visualize it.
Because dogs can't operate MRI machines, but catscan.
A. "One can read, one can write and one to keep an eye on the two intellectuals."
He wanted to win the No Bell Prize.
Unix
None. Horses are not known to use operating systems nor computers for that matter.
She didn't like it because she couldn't get channel 9.