A blade server is a server chassis housing multiple thin, modular electronic circuit boards, known as server blades. Each blade is a server in its own right, often dedicated to a single application. 

A group of protocols or rules for transmitting data between network points (sometimes called nodes). In HDLC, data is organized into a unit (called a frame) and sent across a network to a destination that verifies its successful arrival. 

The use of parallel processing for running advanced application programs efficiently, reliably and quickly. The term applies especially to systems that function above a teraflop or 1012 floating-point operations per second. 

An Internet service provider (ISP) feature that speeds up data transfer by using an 'Acceleration server', that acts as a bridge between the user's dialup connection and a Web page. 

A packet-based mobile telephony protocol used in 3G UMTS radio networks to increase data capacity and speed up transfer rates. HSDPA, provides download speeds at least five times faster than earlier versions of UMTS.

A short-distance communications interface that is commonly used to interconnect routing and switching devices on local area networks (LANs) with the higher-speed lines of a wide area network (WAN).

A charting library written in pure JavaScript, that offers intuitive, interactive charts for web sites or web applications. 

Hike Messenger is a cross-platform instant messaging service for smartphones that uses the internet for communication. In addition to text messaging, users can send each other graphical stickers,[6] emoticons, images, videos, audios, files, voice messages, contacts and user location.

A set of wireless local area network (WLAN) communication standards primarily used in European countries. There are two specifications: HiperLAN/1 and HiperLAN/2. 

HipHop Virtual Machine or (HHVM) is an open-source virtual machine designed for executing programs written in PHP and hack. HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the development flexibility that PHP provides. HHVM is used by many including the omnipresent site, Facebook.

Holistic Information Security Practitioner Institute Holistic Information Security Practitioner (HISP)

Hitachi Data Systems (HDS) is a company that provides modular mid-range and high-end storage systems, software and services. It is a wholly owned subsidiary of Hitachi Ltd. and part of the Hitachi Information Systems & Telecommunications Division.

Hive is an open source project under the Apache Software Foundation, initially developed by Facebook. It is a data warehouse infrastructure built on top of Hadoop for providing data summarization, query, and analysis. Hive provides a mechanism to project structure onto this data and query the data using a SQL-like language called HiveQL.

A holographic storage device that uses a laser to store data to optical media in three dimensions, maximizing  storage capacity by using the media's depth. 

Computer storage that uses laser beams to store computer-generated data in three dimensions. E.g. a credit card containing a logo in the form of a hologram. The idea is to use this type of technology to store computer information. 

The automation of electronic devices within a residential building. It may include centralized control of lighting, ventilation appliances, security locks of gates and doors etc. to provide convenience, comfort, energy efficiency and security.