PSD is a file extension used by Adobe Photoshop to store its graphics files. Adobe Photoshop is a de-facto standard in a raster image editing software. First version of Photoshop was developed in 1988 by Thomas and John Knoll. It was subsequently sold to Adobe Systems which owned it since then.

JavaScript Object Notation (JSON) is a format used to store structured data in JavaScript derived data format. JSON was designed by Douglas Crockford while his work in State Software. JSON at that time was designed to exchange application state information between web application and back-end server.

GPX is the standard file extension for the exchange and storage of map and route data on GPS devices, smartphones and computers.

A file with DXF extension (acronym for Drawing Exchange Format) is a file format for CAD design drawings that belongs to the AutoCAD program group, and is used to save the drawings created by those programs. This type of files allows interoperability between the DWG files, proprietary file format of the AutoCAD program, and the rest of the programs on the market, proprietary or license free.

CFG file extension is used by files storing various kinds of configuration information. CFG files are frequently referred to as configuration files. Configuration files can store various parameters, settings and start-up information used by applications or operating system.

Office Open XML (also referred to as OOXML or Open XML) is an ISO/IEC standardized ZIP-compatible file format originally developed by Microsoft for representing spreadsheets, charts, presentations and word processing documents. Starting with Microsoft Office 2007, the Office Open XML file formats (ECMA-376) have become the default file format of Microsoft Office.

PAGES if a file extension used by Apple Pages word processing software. Apple Pages was initially released for Mac OS in 2005. It is distributed as part of iWork Suite and also as an individual application. Apple Pages is integrated with iCloud service and allows editing documents on any device using web browser.

CDR is a file extension used by CorelDraw application. CorelDraw is a well-known vector editing software. Its initial version was released in January 1989 for Windows 2.0 and since then more than 20 versions of CorelDraw were released. At this time CorelDraw is available in desktop versions for Windows and Mac OS operating systems.

File with DOWNLOAD file extension usually contains an incomplete download started by Apple Safari web browser. Apple Safari adds .DOWNLOAD file extension to a file name when it starts downloading. When downloading process is done .DOWNLOAD file extension removed from the file name.

A DST file is used for Tajima embroidery machines. Any file that carries the DST extension is an image created by software that modifies common image files such as JPG, GIF or TIF for a readable format for embroidery machines.

A file with an STP extension contains the 3D object project that meets the standards of the STEP format (Standard for exchanging product data). STP files are similar to STEP files in terms of structure and format, STEP is just less used.