P99 may refer to: Embraer P-99, a Brazilian maritime patrol aircraft Ferguson P99, a Formula One racing car , a patrol boat of the Royal Australian Navy , a submarine of the Royal Navy Papyrus 99, a biblical manuscript Walther P99, a pistol P99, a NIOSH air filtration rating P99, a state regional road in Latvia P99, a terminal introduced in 1976 by Northgate Information Solutions