Here is an interesting bit of APL history: Brian Kernigan wrote an entire APL interpreter in the early days of Unix. It was further developed by a number of others, and remained in use for decades. I have used it on Linux and Unix boxes on many projects large and small since grad school days. Recently I decided to see about trying to contribute to this cherished bit of community legacy. Working with the code is like pair programming across time with giants and geniuses! I am engaging in "TDP" programming, a facetious phrase we use with management at work: Temporally Decoupled Pair Programming...