If you take your pet to an emergency vet clinic, you will probably be given a copy of your critter's record to show to the "regular" DVM during your followup visit. If you know what the following stuff means, you may even be able to decipher some of that record for yourself the next time you see one.

ADR - Ain't Doin' Right (yes, really!)
BAR - Bright, alert, and responsive
QAR - Quiet, alert, and responsive
HBC - Hit by car
GSW - Gunshot Wound (Usually buckshot, in my neck of the woods)
Dx - Disease
Sx - Surgery
Rx - Prescription
Hx - History
Tx - Treatment
FeLV - Feline Leukemia Virus
FIP - Feline Infectious Perotinitis
FIV - Feline Immunodeficeincy Virus
R/O - Rule out
PO - By mouth
NPO - Nothing by mouth
SID - every 24 hours
BID - every 12 hours
TID - every 8 hours
QID - every 6 hours
QOD - every 48 hours
PRN - as needed
QTTS - drops
V/D - Vomiting and diarrhea
OD - Right eye
OS - left eye
OU - both eyes
AD - right ear
AS - left ear
AU - both ears
NSF - Nothing significant found

I'm sure a lot of these are things human doctors use too, but bleah, who cares about humans anyway? ;)