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.
Open PSD File File Extension EML EML file extension is used to store email messages in RFC-8222 format. Many applications including Outlook Express, Thunderbird, Apple Mail, Windows Mail, Postbox, and others use EML format to export and import e-mails.
Open EML File File Extension BIN BIN file is short for binary file. It is impossible to open BIN files in text editor because they consist of information in binary form which could only be enterpreted by computer applications or operating system. This extension is also associated with extension used for UNIX executable files.