Apparently quite common among hackers. I remember reading a section about it in ESR's Jargon File ages back that had a great explanation:

  Consider, for example, a sentence in a vi tutorial that looks like this:

  Then delete a line from the file by typing “dd”.

  Standard usage would make this

  Then delete a line from the file by typing “dd.”

  but that would be very bad — because the reader would be prone to type the string
  d-d-dot, and it happens that in vi(1), dot repeats the last command accepted. The
  net result would be to delete two lines!

http://catb.org/jargon/html/writing-style.html

I've used the Oxford comma since high school when my favorite English teacher introduced me to them. At the time I didn't know they had a name. I found out they were called Oxford commas about five days ago when watching an episode of Boss on Starz. Since looking it up then I suddenly come across the term a lot now which is weird because I had never heard that term before.