Peer-to-Peer, Path to Profitability, P to P
P2P can mean one of two things:
1) Peer to peer allows internet users to transfer files directly, rather than through the use of a website or directory. File transfers are done directly from the users' computers.
2) Also an abbreviation of "path to profitability," referring to the new startups currently losing money.
Investopedia Commentary
A perfect example of peer to peer is the internet file swap sites that allow users to transfer audio, video, and other types of files for free.
See also: Business to Business (B to B), Business to Consumer (B to C)
Also spelled: ptopP2P