Any interesting suggestions? Best wishes, Philipp :-) I used to set up a conversion of typewriter input to visible punches in the paper tape. For example, a kid would type his name, the punch would put out his name in 5x7 dot characters. Or a 6x8. They could tear it off and take it with them. I used a standard character generator pattern I found in a data book. Another fun one is to use a mortgage program and have someone give the inputs from their mortgage payments. Then have them increase the payment by $20 a month and see the impact. (The extra money goes against principle so it shortens the pay off time by years.) Assembly for the visible character, Fortran for the mortgage. Have fun. Billy