Question) >Somewhere I have a couple of sets of APL keycaps for IBM Type-M keyboards. >Wonder if the mapping is the same? Answer) I have seen differences between keyboards. Link: https://dl.dropboxusercontent.com/u/8040060/TandyColorComputer/APL/AplCoCoKe yboard.bmp Link: http://en.wikipedia.org/wiki/File:APL-keybd2.svg John Mark Mobley