None. Horses are not known to use operating systems nor computers for that matter.
Someone who knows how to play the bagpipe and doesn't.
When they get a hole-in-one they write down *zero* on the scorecard.
He used the holy immaculate contraception
Mascarpone
A horse and rider.
Try two pairs of stilts!
A Dell
The Mail Room
It doesn't matter.
Doesn't matter... must not look down..
The bogeyman.
Denim denim denim...
The operating system