I remember on my first day of third year of med school, I was completely stumped by the signout sheet I was handed:
68 y/o m c h/o ESRD on HD s/p cabg x 3....
I was like, "68 what what what what what on what what what?"
I basically had to have the sub-intern translate the entire thing for me word by word.
Eventually, I got to know the medicine abbreviations. Except then when I went to PM&R, there was a whole new set of abbreviations to learn. I'm guessing you're all familiar with the medicine abbreviations, but I'm curious how well my audience knows the standard rehab abbreviations. Here's a sample of ones I use very commonly, try your luck:
7. ICP (I use this for two things)
20. SPC (I also use this for two things)