PS

P.S. commonly refers to:

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

Arts and entertainment

PS Classics, a record label
P.S. (album), a compilation album of film music by Goran Bregovic
P.S. (A Toad Retrospective), a compilation album of music by Toad The Wet Sprocket
"PS", 2003 song by The Books from the album The Lemon of Pink
"P.S.", 1993 song by James from the album Laid

Pashto language (ISO 639 alpha-2 language code "ps")
Proto Semitic, a hypothetical proto-language ancestral to historical Semitic languages of the Middle East
The sound of the Greek letter psi (Greek) (ψ).

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

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

P_s or static pressure, in fluid mechanics and aviation
Proton Synchrotron, a 1959 particle accelerator at CERN
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