Ph

From Wikipedia, the free encyclopedia

PH, ph, pH, and Ph are initialisms or other abbreviations that may refer to:

• pH, a measure of acidity in chemistry
• -Ph, a phenyl ring in organic chemistry
• PH, the Philippines' ISO country code
• .ph, the Philippines' Internet country code top-level domain
• ph or phot, a measurement of illuminance (photometry)
• pulmonary hypertension, a medical condition
• Ph is an old name service protocol described by RFC 2378 : RFC 2378
• PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory
• φ, the Greek letter
• Ph (digraph), a digraph that represents the phoneme /f/ in phonetics
• Polynesian Airlines' IATA airline designator
• (ph), an abbreviation found on CNN Transcripts meaning "paraphrased"^[1]
• Ph.D, Philosophiæ Doctor (Latin)

1. ^ http://transcripts.cnn.com/TRANSCRIPTS/0302/27/ltm.16.html