Skill Level: Intermediate Status: ActiveFor support professionals in a team lead or supervisor role who possess the fundamental management and leadership skills necessary to provide operational support to the organization and the coaching skills to promote staff development.

HDSL is one of the earliest forms of DSL, used for wideband digital transmission within a corporate site and between the telephone company and a customer. The main characteristic of HDSL is that it is symmetrical.

A television display technology that provides picture quality similar to 35 mm movies with sound quality similar to that of today's compact disc. Some television stations have begun transmitting HDTV broadcasts on a limited number of channels. 

Headphones (or "head-phones" in the early days of telephony and radio) are a pair of small loudspeakers that are designed to be held in place close to a user's ears. They are also known as earspeakers, earphones or, colloquially, cans. The alternate in-ear versions are known as earbuds or earphones.

Health care or healthcare is the maintenance or improvement of health via the diagnosis, treatment, and prevention of disease, illness, injury, and other physical and mental impairments in human beings. Health care is conventionally regarded as an important determinant in promoting the general physical and mental health and well-being of people around the world.

Heartbleed is a programming error (a.k.a bug) in the Open SSL code used by two thirds of the websites to protect customer/consumer information from hackers. Open SSL is used to transfer data between two devices over a secured line. The vulnerability lies on the servers that processes and transmit secure information.

In the OSPF communications protocol which enables network routers to share information with each other, a HELLO packet is a special packet (message) that is sent out periodically from a router to establish and confirm network adjacency relationships. 

A simple program that, when run, displays the message: Hello World . Fittingly, the Hello World program has long been the new programmer's induction into a myriad of programming languages.

Hermes deployment concept is designed to a degree that enables deployment to be prepared in the Implementation phase. It describes how the deployment will take place like the Deployment Procedure, Deployment Organization and the Deployment Measures.

Heroku is a cloud platform as a service (PaaS) with base operating system is Debian. It is one of the first cloud platforms, and supported only Ruby programming language initially, but later added support for Java, Node.js, Scala, Clojure and Python and (undocumented) PHP and Perl.

Hewlett Packard Enterprise (HPE) is an business-focused organization with comprises of four divisions:  Enterprise Group, Services, Software, and Financial Services. HPE is formed based on a strategic split of Hewlett Packard into HPE and HP Inc in the year 2015.

HP is best known for its line of personal computer printers, has also long been a leader in mid-range computer systems. It was founded in 1939 by Stanford University grads, William R. Hewlett and David Packard.

A vector graphics language, a type of object-oriented language that represents images through the use of geometrical formulas. Vector graphics are more efficient than the alternative, raster graphics: they require less memory space for storage.

A telecommunication technology in which optical fiber cable and coaxial cable are used in different portions of a network to carry broadband content (such as video, data, and voice). 

Hitachi Global Storage Technologies (HGST)'s HelioSeal Technology hermetically seals the HDD and replaces the air inside with helium, which is one-seventh the density of air. The less-dense atmosphere resets the boundaries and challenges of conventional high-capacity HDDs, allowing for dramatic increases in efficiency, reliability and value. HelioSeal technology complements magnetic recording technologies like shingled magnetic recording (SMR), heat-as- sisted magnetic recording (HAMR) and bit-patterned media (BPM). When paired with SMR, HelioSeal technology will enable the fast-growing cold storage market.

Hibernate is a free and opensource java library used for object relational mapping. It provides a framework to map java classes with traditional relational database, so that you focus on objects of your application and not worry about how to store and find them later.