Click the link.
You would find this in a list of abbreviations. Mr. is an abbreviation for Mister.
Here is a list of degree abbreviations. http://www.abbreviations.com/acronyms/DEGREES It is represented in an alphabetical order to ease you find out the abbreviation that you are looking for.
Every trust should have its own list of recognised abbreviations. If it's not on the list - don't use it!
IM (instant message) slang is basically abbreviations used to make conversing via text message faster and easier. Abbreviations such as lol (laugh out loud), brb (be right back) and gtg (got to go) are some examples of instant message slang.
Email me at quietdru@hotmail.com I actually have a list but it is way too long for me to list them all send me the abbreviations you need to figure out and I'll see if I can find it for you
missur=mr., page=p.g, television=t.v
what does DOM mean
List of 204 countries and there abbreviations is available on the related link
You can usually find all abbreviations in a spelling dictionary. (obviously of the language you want to find abbreviations for...)
These are two separate questions. You can find dictionaries of both sorts online if you search for them.
One can find a list of state abbreviations for the US almost anywhere. Sometimes they are listed on the backs of maps, and others are often listed on websites. One of the most convenient places to look for them are websites such as Google, because they are given out automatically without really having to search for a long time.
There are too many to list and the AAMT (whatever they call themselves now) keeps changing the list all the time. Usually your employer will furnish you a list of abbreviations approved by their clients. Stedmans also publishes a book of medical abbreviations. The abbreviation cc is now mL. Any abbreviation that is not clear what it is.