Let’s start with a little bit of history.

In 1980, at the MIT Artificial Intelligence Lab, programmers were refused to access the source code for a new printer in the lab. One of the programmers had modified the source code of the previous printer so that it would message a user when a print job was done.

In those days, that was a nice tweak to have when printers were slower and a lot more people shared a printer – and in this case, the printer wasn’t even on the same floor for some people. Yet with the new printer, this was not being permitted to be done.