Answer:
approx. - approximately
appt. - appointment
apt. - apartment
A.S.A.P. - as soon as possible
c/o - care of, used when sending mail to someone who's not at their usual address
dept. - department
D.I.Y. - Do it yourself
est. - established
E.T.A. - estimated time of arrival
min. - minute or minimum
misc. - miscellaneous
Mr. - Mister
Mrs. - Mistress (pronounced Missus)
no. - number
R.S.V.P. - Répondez, s'il vous plait, this initialism comes from the French for "please reply." It's used on invitations to parties and events and is intended (as it says) to be responded to with a "yes, we will attend," or "no, we will not."
tel. - telephone
temp. - temperature or temporary
vet. - veteran or veterinarian
vs. - versus
tsp or t - teaspoon/teaspoons
tbs, tbsp or T - tablespoon/tablespoons
c - cup/cups
gal - gallon
lb - pound/pounds
pt - pint
qt - quart
hope this is what tou looking for. theres more than 20, so you can pick and choose