Well, there's supposed to be one after etc. but many people leave it off. It's pretty much widely accepted now, although you may want to leave the period on if you are writing a paper or a professional letter.
Yes, because the rule that normally applies is that every abbreviation which comprises both initial and last letter of a word has no periods which is not the case with a word lacking its ending (one or more letters).
For example: Mister should be abbreviated as follows: Mr --> without any period.
Yes, you do use a period. The reason for using the period is to indicate that it is an abbreviation, not a word. For example, cat is a four legged animal while cat. is catalog.
The exception is the two letter US Postal abbreviations or compass points (N, SW, etc.), no periods are used.
Yes, it is customary to put a space after a period when used for an abbreviation.:)
No, unless you are ending a sentence with a state abbreviation, you should not put a period after it.
No the letters are just capitalized.
Ms is not an abbreviation, therefore no period. If anyone feels it is an abbreviation, please state what it is an abbreviation of. I think I ended the last sentence incorrectly.
A period .
None. But it is the abbreviation of Alberta, a Canadian province.
WY is the abbreviation for the state of Wyoming.
Michigan.MI is the abbreviation for the state of Michigan.
The old postal abbreviation was "Wash." The modern postal abbreviation is "WA" (without a period).
Ms is not an abbreviation, therefore no period. If anyone feels it is an abbreviation, please state what it is an abbreviation of. I think I ended the last sentence incorrectly.
A period .
IN is the abbreviation for the state of Indiana.
None. But it is the abbreviation of Alberta, a Canadian province.
It is not a state abbreviation in the US.
The abbreviation for the state of Missouri is MO.
In correct English, every abbreviation should have a period at the end
The state with the abbreviation KY is Kentucky.
The abbreviation for the state of Pennsylvania is PA.
The abbreviation for the state of Alabama is AL.
MS is the abbreviation for the state of Mississippi.