I have a Minitran card, depicted below. It was in use around 1969 for teaching Fortran to school students.
You used it by using a bent paper-clip to punch out chads corresponding to what you wanted. For example, the "IF(" chad for an IF statement.
As I recall, there were only variables starting with A, B, I, J (probably followed by one or more numbers). As you can see, the other letters of the alphabet, except F, are not present.
I seem to remember you could calculate trigonometric functions like Sin, Tan, Cos, etc. But how? Does anyone remember these, and how you would do it? A possible way would be to use the F chad, eg. F1 = Sin, F2 = Cos, F3 = Log, etc.
If anyone knows how this was done, I'd appreciate hearing. Googling for answers hasn't been very helpful.
