I would hope to have been given programming interfaces that didn't have a multi-fortnight compile time. I think a primitive assembly language and a way of specifying logic circuits would be easy to provide. Books about language and OS design would also be good - quite likely existing languages wouldn't be optimal for nearly instant compiling. I'd look at Forth as a possible language rather than any I currently use. There should be workstations with graphics output controlled by programmable analogue circuits for once you work out how to program them efficiently.