Pines are conifer trees in the genus Pinus , in the family Pinaceae. They are the only genus in the subfamily Pinoideae. The Plant List compiled by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accepts 126 species names of pines as current, together with 35 unresolved species and many more synonyms.

Pine is a freeware, text-based email client which was developed at the University of Washington. The first version was written in 1989, and announced to the public in March, 1992. Source code was available for only the Unix version under a license written by the University of Washington. Pine is no longer under development, and has been replaced by the Alpine client, which is available under the Apache License .