Grammatically Correct: The writer's essential guide to punctuation ...

\ PUNCTUATION
of the term itself. Writing it as "CREATING DBC'S" would avoid this
problem.
In cases of numbers and letters where no ambiguity is likely,
some authorities say to include an apostrophe; others say not to. The
trend today is toward the latter, but this is certainly not universal.
Whichever approach you take, be consistent.
The school is strong on the three R's.
The school is strong on the three Rs.
His best work was done in the 1980's.
His best work was done in the 1980s.
He refuses to fly in anything but 747's.
He refuses to fly in anything but 747s.
She belongs to two YWCA's.
She belongs to two YWCAs.
The hospital has a shortage of RN's.
The hospital has a shortage of RNs.
PLURALIZING NON-NOUN WORDS
When a word that is not a noun is used as one and appears in plural
form, an apostrophe often helps make it clearer to the reader just
how that word is intended. Without the apostrophe, the reader might
have to pause or backtrack to pick up on the meaning.
Editors must know their which's from their that's.
I'm not taking any more "sorry's."
Her speech was riddled with "you know's" and "urn's."
The response from the class was a chorus of no's.
Using an apostrophe in these cases can be a matter of judgment.
Some writers would exclude them in such familiar expressions as
"no ifs, ands or buts"; others would include them. Make your decisions
about such plurals on a case-by-case basis.
WHEN NOT TO USE A PLURALIZING APOSTROPHE
Common errors are to include apostrophes when pluralizing words
that end in a vowel, words that end in y, and names. Consider the
following:
199