I have an elderly pal who has worked as a mechanical engineer all his life. He has bought a computer, and I thought it would be good for him to look the newsgroups. I've shown him this one, but are there any others he might like? He's into lathes and presses and welding and stuff like that. He still has his workshop (for the time being) and to me it is an amazing place full of big machines and cleverness.