Speaking as a college educated computer worker who posts here, I suspect that you might not have a clue. I spent a lot of last summer welding heavy metal, I am no stranger to hard-hats, safety boots and building sites. I have worked assembly, labour and construction, alongside code, graphics and networks. I get bored of desks quite regularly and have to go off and lift heavy things for a while. Is a bit like going to a gym where they pay you.

Be very careful of stereotypes, especially among groups that are well known for idiosyncrasies, which at the last count is pretty much all the groups.