In the abbreviation "Dr.", you subtract the letters octo and add a period to make it shorter. And with "Jr.", unio are removed from the word to make that shorter.
Does this mean we can take words like "octopus" and "union" and change them to "pus." and "n."? If so, I'm all for it. Especially if there’s somebody who writes the phrase Octopus Union a lot. I doubt there is such a person, but if they're out there and reading this, I just saved them a lot of time.
It’s highly unlikely that such a Union exists. Perhaps that means I need to up and start a Pus. N. myself just so I can make good use of this thought provoking marriage of time saving abbreviations.