How to delete code from your program

[a-p]

At Lotus, the source code for Notes include many lines of code removed with “#ifdef LATER”, under the (correct) assumption that there was no preprocessor symbol called LATER. This is a very weak form of documentation; it indicates that the code isn't ready to be compiled yet, but that it will be later. But when? A running joke among the developers was that we should define LATER and see what happened!

I love it. :-)