Trivia: The code shown as being from the mainframe is neither C++ (an another trivia post claims) nor COBOL, but just regular C. If it were C++, it would be using classes. The first screenshots (when Wally is away) are body code, the ones where Wally is present and is fixing the code are C headers. It seems that the people who wrote the episode actually knew which languages to refer to. Indeed, managers liked to choose COLBOL as a language of choice in the 70s, even though engineers didn\'t like it. But the animators probably didn\'t know how different languages looked like, and random C code is now easier to find than COBOL. (I can\'t post trivia, so I have to post this as a review.)