Most operating systems, such as VM/CMS, DOC, CP/M, VMS, Mac OS X, and of course Windows, use the method to determine file formats by checking the ending name of files. The letters which follow the final portion of the filename are called extensions. If you look at HTML files, you can see that they are identified by .html/.htm extensions. The same you can see with GIF files – their extension is .gif. In the very beginning FAT File System, all files were limited to maximum eight letters and the extension used to have not more than three letters. Such files were known as 8.3 filenames.
Nowadays, there are so many different extensions consisting of three letters, so some extensions have to be linked to different programs. Modern operating systems are much more progressive and they do not have this limitation but still, the majority of file formats have three-letter file extensions. In fact, a standard extension list does not exist. That is why several different formats can give the same file extension. This causes a sort of confusion to many average users and even operating systems.
There are many ways to trick the system is simply by renaming your files. For example, your HTML file can be treated as TXT file. The only this you have to do is to rename your .html extension to .txt. Advanced PC users know this strategy and use it on a regular basis. As for average users, they find it difficult to manipulate this kind of information due to the lack of technical skills. If you rename your file incorrectly, your file can become unusable.
Modern operating systems (Mac OS X and Windows) made the decision to get extensions hidden while listing files. By doing this there is less risk that users will change the name of their files accidentally. At the same time, expert users can turn this feature off and see their extensions displayed.
When the file extension is hidden, this may cause the problem when several similar file names appear in the same folder. For example, a logo needs two formats .PNG for websites and .EPS for publishing. If your file extension is visible, they appear in separate file names, such as logo.eps and logo.png. And when the file extension is hidden, you will just see “logo”. Hidden extensions are also risky in terms of security. They may cause to your personal computer and its operating system.
If you feel that something like this happens to your computer and you are not sure which program to use for your file, you should check this resource Wiki Ext. This is one of the best file extensions encyclopedia. There is a trustworthy website where you will get a professional help on how to open various files. You will find a detailed list of programs for opening any kind of file formats for your operating system. In addition to this information, it is recommended to download an awesome tool for viewing files. Using this tool you will open your extension from over 250 different types.
Every time when you work with hidden extensions, you should remain as vigilant as possible. Use only trustworthy tools and programs for opening files to minimize possible risk of damaging your computer or operating system.