From what I have heard, this sort of frustration is sometimes common with AS. I believe you mentioned somewhere your son also has adhd. I was diagnosed with that early on, and I commonly get frustrated. I don't throw computer equipment around, however. I just tend to get vocal with myself. I would imagine making him pay for what he breaks may make him think twice. I'm not sure what you're doing about it, like if he's breaking computer mice and pens only, it seems to only be things that aren't too expensive.
But I do imagine you're using a Windows based system, cause it's prone to periodic crashes. Maybe you could try Linux or Firefox or Mozilla. I hear they don't crash as much as Internet Explorer, and they're better browsers. Linux, which I don't have, is said to be a better OS.
- Ray M -