PU, Pu, or pu may refer to:
The term public domain has two senses of meaning. Anything published is out in the public domain in the sense that it is available to the public.
Puerto Rico (Spanish for "Rich Port"), officially the Commonwealth of Puerto Rico (Spanish: Estado Libre Asociado de Puerto Rico, lit.
PubMed is a free search engine accessing primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics.
Pulp Fiction is a 1994 American black comedy neo-noir crime film written and directed by Quentin Tarantino, from a story by Tarantino and Roger Avary.
Punk rock (or "punk") is a rock music genre that developed in the early to mid-1970s in the United States, United Kingdom, and Australia.
Punjab () is a state in northern India, forming part of the larger Punjab region. The state is bordered by the Indian states of Jammu and Kashmir to the north, Himachal Pradesh to the east, Haryana to the south and southeast, Rajasthan to the southwest, and the Pakistan province of Punjab to the west.
Public key cryptography, or asymmetrical cryptography, is any cryptographic system that uses pairs of keys: public keys which may be disseminated widely, and private keys which are known only to the owner.
The Punisher (Francis "Frank" Castle) is a fictional character appearing in American comic books published by Marvel Comics.