Don't
The adjective for "about" is approximately (abbreviated approx.).
That is the abbreviated form for 'building' .
M.D.'s
The temperature scale is Celsius (capitalized, or abbreviated °C).
The US state abbreviated NJ is New Jersey.
Thursday is commonly abbreviated to Thurs.
Monsieur Renoir. Monsieur can be abbreviated "m."
The days of the week in English are spelled: Monday abbreviated Mon. Tuesday abbreviated Tues. Wednesday abbreviated Weds. Thursday abbreviated Thurs. Friday abbreviated Fri. Saturday abbreviated Sat. Sunday You can find these on the headers of most large sized calendars.
That is the correct spelling of "navy." The United States Navy is abbreviated USN.
The correct spelling of the rank is "sergeant" (abbreviated title Sgt.), from French sergent.
In sport, the word goalkeeper is abbreviated to "goalie" The expression of surprise is spelt "Golly".
That is the correct spelling of the proper noun Indiana, a US state.