PS may refer to any of the following:
1. PS, P/S, and PSU are abbreviations for a power supply.
3. PS is short for PowerShell.
5. With computer file extensions, .ps is a PostScript file that contain vector or raster graphics and text. PostScript files can be printed by a PostScript printer, opened in many Adobe programs, or converted to a PDF using Adobe Distiller. Today, these files are not as common with the introduction of PDF files.