Common abbreviations found in most standard recipe books.

teaspoon
t
tsp

Tablespoon
T
Tbs.
tbsp

ounce
fl
fluid oz

cup
c.

package
pkg

gram (or grams)
g. (or gms.)

square
sq

pint
pt

quart
qt

gallon
gal

pound
lb

dozen
doz.

Celsius Centigrade
° C

Fahrenheit
° F

See Temperatures for more info on ° F and ° C conversions.