The contributions of MIT for businesses and the economy leaf Dan Bricklin was sitting in a classroom at the Harvard Business School, when he got the idea to create an electronic "spreadsheet" or "Calcu-book" – a way for managers to make Accountants complex using a computer or a project on how your income could grow in different scenarios. Bricklin, a graduate in 1973 from MIT, and fellow MIT alum Bob Frankston leased time …