The abbreviation for Philippines is Ph.
Ph such a three phase is 3Ph for example
FDR
You can abbreviate it with the letter d. But I can't think of a reason why you wold have to abbreviate the word decimal.
The correct way to abbreviate it is: Ph.D.--with a period after the lowercase h and a period after the D
DBA or d/b/a
the abbreviation for diameter is simply just: d
Hors d'oeuvre as no abbreviation in French. The term can be replaced by 'entrée'.
m.sc.
The abbreviation would be ext, for example you could write:My phone number is: 000-123-4567 ext 890
6.71* for Tanny Original *source pH Checker by Hanna
well when d=diameter and c=circumference of any circle, and if we abbreviate pi to 3.14: c=(3.14)(d) and d=c/(3.14)