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

GRAMMATICALLY CORRECT
the same thing in fewer words often makes writing appear less
awkward and more polished.
OTHER USES OF THE COJ\1l\1A
Aside from its main functions, the comma has a few minor mechanical
applications.
SEPARATING NUMBERS
In dates, it is used to separate the day from the year:
june 12, 1996
January 1, 2000
In numbers greater than three digits, it is used as a thousands
separator:
$3,459
139,897
694,775,107,326,960
Note, though, that in some countries a space is used instead:
139 897
In text, it is used to separate two numbers that lie next to each
other:
In 1994, 3 candidates ran for the position of school trustee.
Although the final tally was 983, 247 submissions had to be discarded.
SEPARATING REPEATED WORDS
Whatever it is in here that smells, smells awful.
She finally came in, in a huff.
Whatever he does, he does well.
SEPARATING PLACE NAMES
86
Miami, Florida
Moose jaw, Saskatchewan