PS1, Ps 1, PS-1, PS/1 or PS One may refer to:

Arts and entertainment

* '' Ponniyin Selvan: I'', an Indian Tamil language period action drama film

Technology

* "$PS1", "Prompt String 1" the environment variable in a command-line interface which specifies the

command prompt Command Prompt, also known as cmd.exe or cmd, is the default command-line interpreter for the OS/2, eComStation, ArcaOS, Microsoft Windows (Windows NT family and Windows CE family), and ReactOS operating systems. On Windows CE .NET 4.2, W ...

IBM PS/1 The IBM PS/1 is a brand for a line of personal computers that marked IBM's return to the home market in 1990, five years after the IBM PCjr. It was replaced by the IBM Aptiva in September 1994. Position among IBM's PC brands The PS/1 line wa ...

, IBM Personal System/1 series of home computers *

Pan-STARRS The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS1; obs. code: F51 and Pan-STARRS2 obs. code: F52) located at Haleakala Observatory, Hawaii, US, consists of astronomical cameras, telescopes and a computing facility that is ...

' first telescope, called PS1 * PostScript Type 1 Font * Prosteyshiy Sputnik 1, the first artificial Earth satellite * .ps1, the extension of a Microsoft PowerShell script file

Video gaming

PlayStation (console) The (abbreviated as PS, commonly known as the PS1/PS one or its codename PSX) is a home video game console developed and marketed by Sony Computer Entertainment. It was released in Japan on 3 December 1994, in North America on 9 September 1995 ...

, video game console released by Sony in 1994 ** PS One (console), a miniature version of the original PlayStation released in 2000 * ''Phantasy Star'' (video game), the first in the ''Phantasy Star'' series * ''

PlanetSide ''PlanetSide'' was a massively-multiplayer online first-person-shooter video game published by Sony Online Entertainment and released on May 20, 2003. ''PlanetSide'' chronicles the efforts of three factions as they fight for territorial contro ...

'', a MMOFPS video game published by Sony Online Entertainment

Other uses

Photosystem I Photosystem I (PSI, or plastocyanin–ferredoxin oxidoreductase) is one of two photosystems in the photosynthetic light reactions of algae, plants, and cyanobacteria. Photosystem I is an integral membrane protein complex that us ...

, the second photosystem in the photosynthetic light reactions of plants * MoMA PS1 (derived from "Public School One"), American contemporary art institution * The name and designation for several public schools in the New York City Department of Education; see List of public elementary schools in New York City * Psalm 1 from the Judeo-Christian Book of Psalms * The boxcar in the PS line of post-war standardized freight cars from Pullman-Standard {{Letter-Number Combination Disambiguation