I couldn't actually give an exact number. Let's see... there's the computer labs in college (like about 15 of them which each have bout 30-40 comps), then there's the comps in the college library (let's say 50), then the student centre (10), the restaurant (bout 20), and my home PC.
Of course I haven't used all of them, but you can see why I have no count. I'm always changing computers in school.