Wiktionary
p3
n. 1 (context business English) public-private partnership 2 (context chemistry English) period 3 n. 1 (context computing English) Intel Pentium III 2 (context computing dated English) Intel 80386, 386 family 3 (context military aviation US English) (misspelling of P-3 English)
Wikipedia
P3
P3, P-3, P.3, or P03 may refer to: