I started writing systems software (at IBM, in 360 assembler language) in 1967, but I didn't have your stamina, or single-mindedness: I retired in 1997. But I s

I started writing systems software (at IBM, in 360 assembler language) in 1967, but I didn't have your stamina, or single-mindedness: I retired in 1997. But I still write code for fun.