Un Chingo !!
File extensions tell the computer what kind of program was used to create it, and are usually three letters. Common file extensions are .txt .doc .wps
Extensions are the last part of a file name for example a text file is usually called example.txt the .txt at the end is the extension and can be many differant things depending on the program that creats it.
It depends on what editor you are using to open the file. For there are many extensions a web page can be in.
File extensions are still necessary on Windows. They are no longer limited to three characters on FAT32 and NTFS file systems, though most system files were named with three character extensions in case someone wanted to use FAT16, and many are still named this way for backwards-compatibility purposes.
File extensions tell us what kind of file it is.For example, a .pdf extension tells us that it is an Adobe Acrobat file.Files with the extensions of .jpg, .jpeg, .png, and .bmt are all picture files. (This is not an extensive list of picture files, just an example).Other types of files like .doc, .dot, .dotx, .docx, are Word files. There are many more file extensions for that.Powerpoint files have extensions like .ppt and .pptx.Windows media files have extensions like .wmv.Every software program has its own extensions that identify what it is.In Windows Explorer (or Apple equivalent), you can organize your files by file type if you're looking for a specific type of file. It's also really helpful if you're tracking statistics on file types and usage, or finding a file that you need to use again.The sort by file type feature is very handy when you have a high volume of files in a directory and you're looking for a document of a specific type.If you don't know where you placed your file, you can do a global search on the file type (if you know it) and your computer will give you search results showing only the files with that extension.
Extensions are small programs which can run inside Photoshop. Example is Mini Bridge, Kuler in Photoshop CS5 but there are and many 3rd party extensions. Sometimes people refers to file format as extension or file extension like .csh extension for example to save Custom Shapes.
Although i havn't found an emulator for them, a .z5 file is one of the many extensions infocom used for IF's in their Zmachines. (.z1, .z2, .z3,.z4... etc) perhaps that will point you in the right direction.
A compressed folder can have many extensions. The usual windows extension is .zip. But .7z (for 7zip) and .rar can also be used.
When using digital graphics on a computer there are many different types of file extensions: .BMP, .GIF, the one you are referring to is called .TIF and stands for Tagged Image Format.
One extension can be associate with many application, as far as common.pfb extension is concerned its a FontType file and Adobe Type Manager used to open it.
The price on Cinderalla hair extensions can vary from $5-$70. These hair extensions can be found on Amazon. Amazon sells many of these extensions on their website.
File formats and extensions are more or less the same thing. Their importance lies in identifying how to use the file. That is, having a document with the extension .doc or .docx tells the computer that the file needs to be opened using a word processing application. If the file extension (the .XXX) is .jpg for instance, the computer knows that it is an image file and that it should open it with an image viewer.I hope this clears things up for you.