Micro Men (2009)
The British equivalent movie about the war between Sinclair and Acorn in the 70's and 80's, where the latter was founded by a guy from the former. It's a fun story simply because of how spectacularly both companies went bust, one from a single mathematical mistake and the other from having an eccentric owner who said "by 1990 we'll all have electric cars" and who put all his money in to that.
Opinions are just onions with pi in them.