AI -- Adobe Illustrator -- is the default file type for Illustrator which saves completely editable and scalable vector graphic images. Certain AI files are viewable with PDF readers; however, they will not allow you to edit the file's layers or individual elements.
The dir command can also be used to list only files with a given extension. For exampledir myfolder\*.doc /s >listmyfolder.txt will list all Microsoft Word files in myfolder and its subfolders. This form of the command will also list all the directories and sub-directories.
EPS or Encapsulated PostScript is a standard graphics file format for exchanging images, drawings (such as a logo or map) or even layouts of complete pages. An EPS file internally contains a description of such an object or layout using the PostScript page description language.
The GIF (pronounced DJIF by many, including its designer; pronounced GIF with a hard G by many others) stands for Graphics Interchange Format and is one of the two most common file formats for graphic images on the World Wide Web. The other is the JPEG.
Portable Document Format (PDF) is a file format used to present and exchange documents reliably, independent of software, hardware, or operating system. Invented by Adobe, PDF is now an open standard maintained by the International Organization for Standardization (ISO).
TIFF, an acronym for Tagged Image File Format, is one of the most widely used file formats for storing images. TIFF images can use almost any resolution, and they can be black and white, gray-scaled, or color. Many different compression methods are also supported by the format. Compression methods like CCITT-G4, Deflate and LZW are commonly used.