In programming, an extension is a file containing programming that serves to extend the capabilities of or data available to a more basic program. Extensions are sometimes required to be stored in a separate extensions file so that they're easy to locate. 

A file format is a standard way that information is encoded for storage in a computer file. It specifies how bits are used to encode information in a digital storage medium. File formats may be either proprietary or free and may be either unpublished or open.

A file management system is a type of software that manages data files in a computer system. It has limited capabilities and is designed to manage individual or group files, such as special office documents and records. It may display report details, like owner, creation date, state of completion and similar features useful in an office environment.

In the client/server model, a file server is a computer responsible for the central storage and management of data files so that other computers on the same network can access the files.

The public or private sharing of computer data or space in a network with various levels of access privilege. 

The way in which files are named and where they are placed logically for storage and retrieval. The DOS, Windows, OS/2, Macintosh, and UNIX-based OS all have file systems in which files are placed somewhere in a hierarchical (tree) structure. 

The movement of one or more files from one location to another.

An ISO standard that specifies methods of transfering files between networked computers. FTAM is based on the Open Systems Interconnection (OSI) model and is similar to File Transfer Protocol (FTP) and Network File System (NFS).

A standard Internet application protocol for transmitting files between computers on the Internet using TCP/IP protocols.

The creation of an abstraction layer between file servers and the clients that access those file servers. The file virtualization layer manages files and file systems across servers, and also enabling one logical file mount for all servers. 

File-AID is Compuware’s cross-platform file and data management solution that allows developers and QA teams to perform all data-related tasks without writing programs or scripts, coding SQL or using multiple utilities.

A relational database application known for being easy to use and for its ability to serve Web pages dynamically without requiring the use of additional third-party applications. 

FileMaker Certified Developer by FileMaker

The latest version of FileMaker that has been redesigned so that its user interface more closely resembles that of Microsoft's Office. FMP5 can be used with a wide variety of middleware applications, CGI scripts, and application servers.

FileNet is a software product based company that provides Enterprise Content Management (ECM) and Business Process Management (BPM) solutions to Enterprises. It has been acquired by IBM. The FileNet P8 platform, their flagship system, is a framework for developing custom enterprise systems, offering much functionality out of the box and capable of being customized to manage a specific business process.

FileZilla is an open-source and free cross-patform FTP client which can be used to share folders over a network. FileZilla Client is available for Windows, Linux and Mac OS X, but where as the FileZilla Server is only available for Windows.