We hope that they are helpful.
Files can come in a variety of formats, especially over the Internet.
Text files are transmitted as straight text, so you do not need a special viewer for them. HTML files are also transmitted as text. Binary files, however, are specially encoded file formats that need special programs to view them or specific operating systems to run them. For the purposes of file uploading and downloading, text files are limited to .txt and .html extensions. Image, video, sound, and program files need to be transmitted as binary files.