PS

Look up PS in Wiktionary, the free dictionary.

PS, P.S., ps, and other variants may refer to:

Chemistry

Chloropicrin, a highly toxic chemical compound
Phosphatidylserine, a phospholipid
Phosphorothioate (or Thiophosphate), a family of compounds and anions with the general chemical formula PS_4-xO_x³⁻ (x = 0, 1, 2, or 3).
Polystyrene, a common type of plastic
Ps, Positronium, pseudo-chemical symbol

Adobe Photoshop, a graphics editor and creator by Adobe
MPEG program stream, an MPEG-2 container format
Parametric Stereo, feature used in digital audio
PostScript, a page description language
.ps, filename extension for a file in PostScript format
ps (Unix), an application that displays statistics on running processes
.ps, the State of Palestine Internet domain extension or top-level domain (ccTLD)
PS Power and Sample Size, an interactive computer program for power and sample size calculations
Windows PowerShell, a command line scripting and system management shell for Microsoft Windows

P.S. (album), a compilation album of film music by Goran Bregovic
P.S. (film), a 2004 film
P.S. (A Toad Retrospective), a compilation album of music by Toad the Wet Sprocket
PS Classics, a record label
PS Publishing from the U.K.
"PS", 2003 song by The Books from the album The Lemon of Pink

PlayStation, a series of video game consoles developed by Sony Computer Entertainment

Panayiotopoulos syndrome, a childhood seizure disorder
Progeroid syndromes, a group of rare diseases causing premature aging
Pulmonary stenosis or pulmonic stenosis, obstruction of the pulmonary artery of the heart