File Extension PS
File extension PS identifies a Postscript-formatted file, meaning that it is a Postscript printer-ready file type.This type of file can be used in the programs or functions such as works file, Apple II file, PaulShield Song/module and Postscript. The mime types for Postscript, which is a page programming language used for desktop publishing are, application/postscript, application/ps, application/x-postscript, application/x-ps, text/postscript and application/x-postscript-not-eps.

The PS file extension can also be a gzip/document and image/x-Rosetta. Some of the program ID that are used on the files with this extension are ACDsee.ps, AcroDIst, paintshoppro8image, graphicsconverter, psp7.Image, Ypager.Messenger, Works.word.Document.8, photoshop.EPSFile, mpegfile, MicrosoftWorks.WordProcessor.5, PaintShopProX.Image, CorelDRAW.Graphic.10, among others.
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Postscript is a PS file type that falls in the category of the vector image files. It is possible for one to see files that contain Postscript data that can easily be sent to a compatible printer for it to be printed. Files that are for Encapsulated PostScript files can have either a page section or an individual graphic.

Programs that can open a file extension PS are on Windows; Adobe Illustrator, Adobe Acrobat, ACDSee Photo Manager, Adobe Photoshop and Any printer utility that supports PostScript; on the Mac OS, Adobe Photoshop, Adobe Acrobat and Any printer utility that supports PostScript opens this file format. The Image that is saved in the description page of the Postscript includes both vector graphics and text is printable using the PostScript printer without the need for opening an application.
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During the opening of the PS file, one can cross check the dialogue box that says "Associate PS to PDF Converter" at the installation, and then click twice on the PS file to convert it to PDF. Finally the PDF file should be opened with Acrobat Reader. Unless you convert it, you will need specific software such as Ghost view or AFPL Ghostscript to open a file extension PS. This software can be easily downloaded from the internet too.