From Teflpedia

P (/pi:/ lower case p) is the 16th letter of the Latin alphabet, as used in English, and the 12th consonant letter.

P p

P, by itself or doubled, reliably represents the unvoiced bilabial stop /p/. The IPA symbol for this phoneme is also /p/. It has occasionally elided from words, e.g. raspberry, cupboard.

P also forms the digraphs ph /f/, ps /s/ and pt /t/.

In statistics, p represents mathematical probability.