PS1

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

Biology

Photosystem I, the second photosystem in the photosynthetic light reactions of plants

Education

MoMA PS1 (derived from "Primary School One"), American contemporary art institution

Technology

"$PS1": the environment variable in the Bourne shell and variants which specifies the command prompt.
IBM PS/1, IBM Personal System/1 series of home computers
Pan-STARRS' first telescope, called PS1
PostScript Type 1 Font
.ps1, the extension of a Microsoft PowerShell script file

Gaming

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

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