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The file is a set of characters (words and numbers-numbers that are stored together). Files can be stored in computer hard disk, floppy disk (floppy), CD chip, server and many more other storage media. All stored in a computer, when we open the directory computer will be seen two kinds of folders and files, they will be visible by name, type, size or date of last access to the file.

Extension file
There are a variety of file types that are recognized by the computer, for example, is File Extension TMP, File Extension DLL, File Extension BIN and many more.

TMP File
TMP files are temporary files that can sometimes be removed safely.

DLL files
In a nut shell, a dynamic link library (DLL) is a collection of small programs, which can be called upon when needed by the executable program (EXE) that is running.