Feb 22, 2017ย ยท Recently, I was reading articles on the net and realised that there is a lot of ambiguity over the usage of Dr. and Dr, Er. and Er etc. I usually prefer the dot while writing Doctor (Dr.) or Engin. Use a third-party data recovery app like DroidKit or Dr.Fone, but be cautious and verify the app's authenticity before installation. As a last resort, contact your mobile carrier to inquire if they can. Oct 26, 2016ย ยท "Dr." is an abbreviation for "doctor", and either can be used in most situations. However, it is not idiomatic to say, eg, "Frank is a Dr. at Memorial Hospital", or "Joe is sick so I called the Dr."..