Who is the world's oldest working programmer?

1 Oct 2014

...
    Many seem to trace their ancestry to BCPL, how does
this relate to
 Algol...  
 IIRC, BCPL was block-structured a la Algol.? It was, of course, the direct
 ancestor of B, which is the direct ancestor of C.? We all know that the proper
 successor to C will be named P.   
 I thought there already was a "P" and a "D" ... 
IIRC in one of the HOPL papers, Dennis remarks something to the
effect that they left it intentionally ambiguous whether they where
stepping through the alphabet or through the initials of BCPL.

BLS

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Who is the world's oldest working programmer?