Answer:
1.a thing made or adapted for a particular purpose, especially a piece of mechanical or electronic equipment.
2.In computing, a directory is a file system cataloging structure which contains references to other computer files, and possibly other directories. On many computers, directories are known as folders, or drawers, analogous to a workbench or the traditional office filing cabinet.
3.A filename or file name is a name used to uniquely identify a computer file in a directory structure. Different file systems impose different restrictions on filename lengths and the allowed characters within filenames. ... file – base name of the file.
4.A filename extension, file extension or file type is an identifier specified as a suffix to the name of a computer file. The extension indicates a characteristic of the file contents or its intended use.
