Me too, but not on a calculator, on this: https://en.wikipedia.org/wiki/Texas_Instruments_TI-99/4A https://en.wikipedia.org/wiki/Texas_Instruments_TI-99/4A, and

Me too, but not on a calculator, on this: https://en.wikipedia.org/wiki/Texas_Instruments_TI-99/4A https://en.wikipedia.org/wiki/Texas_Instruments_TI-99/4A, and much earlier than 2011. ;-)