professional
It depends in what the circumstances the abbreviation is used? One example: PA could mean Personal Assistant. There is also Public Announcement!
It depends greatly on the context. In online personal ads, P&P or PnP stands for "party and play," which means to use methamphetamines (crystal meth) and then have sex. In merchandise advertisements, P&P can stand for Postage and Packaging, also known as Shipping & Handling. It is the additional charge for preparing your order and shipping it to you. P&P can also stand for Policy & Procedures.
History and Physical
It means "Società per azioni"
PARTURITION UTERINE FULL TERM :p
P with a line over it means after in medical terms."post"
H is the abbreviation on the table of elements. The 'chemical symbol' for hydrogen is H.
should bt H&P for history and physical
The abbreviation for primary waves is P-waves.
It used to stand for Personal Home Page but today,the first P is dropped and stands for Hypertext Processor
P
The abbreviation for phosphate is PO4.