Industry Terminology
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | XYZ
Helical Scan Recording – A method of recording data on tape in a diagonal motion. Increases track length, track density, transfer rates and total capacity.
Heterogeneous Networks – Networks composed of hardware and software from multiple vendors, usually implementing vendors, usually implementing multiple protocols.
Hierarchical Database – A database that is organized in a tree structure, in which each record has only one owner. Thus, navigation to individual records takes place through predetermined access paths.
Hierarchical Routing - Dividing a network into a hierarchy of smaller networks, and making each level responsible for its own routing. The Internet has three levels in its hierarchy: backbones, mid-level networks, and stub networks. Backbones are responsible for routing between mid-level networks, mid-levels route between sites, and each site does its own internal routing.
Host – The main computer system to which users are connected.
Host Adapter – A printed circuit board that installs in a standard microcomputer and provides a SCSI bus connection so that SCSI devices can be connected to the microcomputer.
Hot Spare – RAID storage feature that allows a spare drive to be configured on-line for automatic reconstruction in the event of a disk failure.
Hot Swap – A storage system’s ability to allow the removal and replacement of a disk drive while users are on-line and accessing data.
HSM – Hierarchical Storage Management. The process of automatically storing data on the lowest-cost devices that can support the performance required by the applications. To users, data storage never fills; file access, regardless of location in the storage hierarchy, is completely transparent. The software automatically manages multiple levels of storage hierarchy.
HTML – Hypertext Markup Language. A language for describing structured documents. The primary focus of HTML is the content of the document, not its appearance. Used extensively for World Wide Web applications, including the creation of hyperlinks.
HTTP – HyperText Transfer Protocol. The protocol most often used to transfer information from World Wide Web servers to browsers
Hub – A concentrator or repeater in a star topology at which node connections meet.
Hyperlink – A predefined link for jumping from one location to another within the same computer network site or event to a location at a completely different physical location. Commonly used on the World Wide Web for navigation, reference and depth where published text will not suffice.