Meaning Homework
Type Abbreviation
Rank ★ ★ ★  Common
Usage General (not just online)
Comments A common way of abbreviating homework. Can also be written "hw."
Updated February 22, 2013
Meaning Husband and wife
Type Acronym
Rank ★ ☆ ☆  Uncommon
Usage Online Only (chat, messaging, e-mail)
Comments Depending on the context, h/w may also be used to refer to a married couple.
Example "Did you know they are h/w? They've been married for five years!"
Updated April 2, 2013