Abbreviations - Editing

When should a period not be used in an abbreviation?

When is it okay to not spell out certain expressions before using the abbreviation?

With initialisms, abbreviations where name is read as a series of letters, there is NEVER a definite article before

When should a period be used in abbreviations of names?

In the scientific community, periods are not used when abbreviating units of measurement

When an abbreviation follows and indirect article, “a” or “an” is chosen by how the abbreviation will be read aloud

An abbreviation that is less common does NOT need to be spelled out when first used

What is an exception to the rule with acronyms?

How many times does CMoS recommend switching over to using an abbreviation?

Don’t use periods with a company name unless they are specifically required by the brand or company (ex:The band R.E.M.)

When used outside of science and technology, which is most common and appropriate way for using abbreviations?

Traditionally, “United States” is used as the adjective form of the name and US is used as a noun.

Other countries such as the British and French, do not use periods in their contractions, for example, Dr

What is the correct way to show an abbreviation of a spelled out word in a document?

What is the correct way to abbreviate the United States? (NOT in publications)

Abbreviations that end with a lowercase letter should end with a period

When should small-sized capitals be avoided?

When does CMoS say to use italicized abbreviations?