<H1> - <H6> - H1 - H6 define level 1-6 headers.

<h1>Header 1</h1>
<h2>Header 2</h2>
<h3>Header 3</h3>
<h4>Header 4</h4>
<h5>Header 5</h5>
<h6>Header 6</h6>

<Head> - Head tags define general information about the document, page title, meta-tags, scripts and links to follow, and other commands to browsers.

   <title>HTML Tags - Head Tag</title>
   <meta name="keywords" content="html tags, head tag" />
   <link rel="stylesheet" type="text/css" href="style.css" />
   <script src="javaexample.js" type="text/javascript"></script>

<Hr> - HR tag draws a horizontal break line. Two choices for the same result: <hr> or <hr />

<Html> Tag - HTML tags contain HTML elements, and give a command to browsers to read the document as an HTML document.


Hacker - Someone who uses their computer knowledge and expertise to gain access to a computer or network. Typically, this access is unauthorized.

Handset - A handset is a term used in reference to a mobile phone or a mobile device.

Handsfree - A way of using your device without physically holding it, such as making a call using voice commands and a Bluetooth® headset.

Hard goods - tangible products that are distributed through the postal or other delivery service. Contrasts with soft goods, which are distributed electronically.

Hard Key - A button that can be tapped or phyiscally pressed and its function does not change. (e.g., volume, power on/off, etc.).

Hard Reset (Factory Reset) - The process of returning a device to its original factory settings using the method outlined in your device's User Manual. A hard reset will remove all of the apps you've downloaded since you got the device and delete your app preferences, system settings and other data stored on the device. Your current OS version will remain the same after a hard reset, and no files will be deleted from any external storage (i.e., SD card) on your device.Only perform a hard reset if your device isn't working (e.g., the screen is frozen, keypad/touchscreen won't respond, audio won't work, etc.) and you’ve tried all other solutions, including a soft reset. Before a hard reset, be sure to back up any data you don’t want to lose, such as video, pictures and music. See also Soft Reset.

Hardware - Physical equipment:- processors, screens, keyboards, mice, printers, scanners, network routers, hubs, bridges, racking, disk drives, portable drives, etc. As the saying goes, if you can kick it, it’s hardware!

HD Voice (High-Definition Voice) - A voice audio technology that gives phone calls a greater level of clarity and quality than traditional wireless audio. HD Voice uses a wider frequency range (50 Hz to 7 kHz) to deliver a more natural-sounding voice quality.

HDMI (High-Definition Multimedia Interface) - A type of audio/video cable and connector that can carry HD video and surround sound audio from a device to an external display and sound system.

HDR (high dynamic range) - HDR (high dynamic range) is the compositing of two images, one that properly exposes the highlights, and another that properly exposes the dark areas. When composited together, you get a properly exposed image.

HDTV (High-Definition Television) - a higher quality signal resolution using a digital format for the transmission and reception of TV signals. HDTV provides about five times more picture information (picture elements or pixels) than conventional television, creating clarity, wider aspect ratio, and digital quality sound. 

Head end - the site in a cable system or broadband coaxial network where the programming originates and the distribution network starts. Signals are usually received off the air from satellites, microwave relays, or fiber-optic cables at the head end for distribution.

Head Match - One of the three different match types that Google Analytics defines to identify a URL for either a goal or a funnel. Matches the characters you specify as the beginning of a string including all strings that end with characters in addition to what you have specified.Example: if you set your head match URI to be "/page1", then "/page12345" will also be included because the beginning of the string is identical.

Header bidding - A monetization tool that exposes each impression to programmatic demand before calling the ad server. This lets publishers realize the true value of their direct and indirect inventory in real time.

Helper Application - A software application that supports another software application. For example, the ecOrderDesk is a helper application ecBuilder.

HERE Drive+ - A car navigation app that can be used in 118 countries, even while offline. Just download the maps you need, and then you can use turn-by-turn navigation for directions anywhere on the downloaded maps.

Heuristic - a way to measure a user's unique identity. This measure uses deduction or inference based on a rule or algorithm which is valid for that server. For example, the combination of IP address and user agent can be used to identify a user in some cases. If a server receives a new request from the same client within 30 minutes, it is inferred that a new request comes from the same user and the time since the last page request was spent viewing the last page. Also referred to as an inference.

High Efficiency Video Coding (HEVC) - High Efficiency Video Coding (HEVC) is a video compression standard which offers double the data compression ratio at the same or higher level of video quality and the same bit rate as the AVC technique. High Efficiency Video Coding supports resolutions up to 8192×4320, which includes 8K ultra-high definition.High Efficiency Video Coding is also known as H.265.

History list - a menu in a web browser which displays recently visited sites. The same mechanism makes it possible for servers to track where a browser was before visiting a particular site.

Hit - when users access a Web site, their computer sends a request to the site's server to begin downloading a page. Each element of a requested page (including graphics, text, and interactive items) is recorded by the site's Web server log file as a "hit." If a page containing two graphics is accessed by a user, those hits will be recorded once for the page itself and once for each of the graphics. Webmasters use hits to measure their servers' workload. Because page designs and visit patterns vary from site to site, the number of hits bears no relationship to the number of pages downloaded, and is therefore a poor guide for traffic measurement.

HMI (Hydrargyrum Medium-arc Iodide) - HMI (Hydrargyrum Medium-arc Iodide) lights emit light via pressurized mercury vapor and metal halides. Ideal for imitating daylight, they keep cooler and have a very high light output. HMI light has a color temperature of around 5600K.

Home Coverage Area - A geographic zone in which Verizon Wireless doesn’t charge for roaming.

Home page - the page designated as the main point of entry of a Web site (or main page) or the starting point when a browser first connects to the Internet. Typically, it welcomes visitors and introduces the purpose of the site, or the organization sponsoring it, and then provides links to other pages within the site.

Honeycomb - The 3.0 version of the Android™ operating system, a tablet-oriented version, which supports devices with larger screens.

HopeLine - A Verizon Wireless service that collects used mobile phones to be recycled or refurbished and sold. The proceeds and refurbished phones benefit victims of domestic violence, as well as nonprofit and law enforcement agencies with domestic violence clients.

Host - any computer on a network that offers services or connectivity to other computers on the network. A host has an IP address associated with it.

Host capture - a credit card processing model where the authorization and capture of the transaction data are accomplished within a single message sent to the payment processor.

Hot shoe - Hot shoe is a mounting point at the top of some cameras that allow you to attach a flash unit, microphones or other accessories.

Hotlists - pull-down or pop-up menus often displayed on browsers or search engines that contain new or popular sites.

Hotspot - An AP set up specifically to provide Internet access to users. Hotspots are popular in coffee shops, restaurants, and other publicly accessible locations, and usually do not require any authentication or offer any encryption. They provide the convenience of free Internet access to attract customers.

HotSync - A method of syncing between a Palm® handheld device and a notebook, desktop or other computer.

House ads - ads for a product or service from the same company. ―Revenues‖ from house ads should not be included in reported revenues.

HTML (Hypertext Markup Language) - a set of codes called markup tags in a plain text file that determine what information is retrieved and how it is rendered by a browser. There are two kinds of markup tags: anchor and format. Anchor tags determine what is retrieved, and format tags determine how it is rendered. Browsers receive HTML pages from the Internet and use the information to display text, graphics, links and other elements as they were intended by a Website‘s creator.


a abbr acronym applet area b base basefont bdo bgsound
big blockquote blink body br button caption center cite code
col colgroup dd dfn del dir dl div dt embed
em fieldset font form frame frameset h1-h6 head hr html
iframe img input ins isindex i kbd lable legend li
link marquee menu meta nonframe noscript optgroup option ol p
pre q s samp script select small span strike strong
style sub sup table td th tr textarea tfoot thead
title tt u ul var

HTTP (Hyper Text Transfer Protocol) - The protocol for moving hypertext files across the Internet. Requires a HTTP client program on one end, and an HTTP server program on the other end. HTTP is the most important protocol used in the World Wide Web (WWW).

Http proxy server - a server that forwards client requests using the hypertext transfer protocol (http) over the world wide web.

Humanware - Humanware is defined in IT as hardware or software that is built around user capabilities and user needs. This often involves creating a particular visual or physical interface for a given set of users. The design and engineering of humanware starts with the user's interests and needs first, and designs the infrastructure accordingly.

HVGA (Half-size Video Graphics Array) - Referring to the resolution on a device’s screen, the size of these screens are 480 x 320 pixels (3:2 aspect ratio) or 640 × 240 pixels (8:3 aspect ratio).

Hybrid pricing - pricing model which is based on a combination of a CPM pricing model and a performance-based pricing model. See CPM pricing model and performance-based pricing model.

HyperCard - HyperCard is a popular visual and programming application for Macintosh and Apple computers. HyperCard was released in 1987 and continued to be offered until 2004.The concept of HyperCard relies on a series of program screens or “cards.” A programming language called HyperTalk allows users to program these cards and the relationships between them.

Hyperlink - a clickable link, e.g., on a Web page or within an e-mail, that sends the user to a new URL when activated.

Hypertext -  Generally, any text that contains links to other documents – words or phrases in the document that can be chosen by a reader and which cause another document to be retrieved and displayed.

Hyper-V Containers - Hyper-V Containers are completely isolated virtual machines (VMs) that incorporate their own copy of the Windows kernel. One of twocontainer models introduced in Windows Server 2016 (along withWindows Server Containers), Hyper-V Containers offer a lightweight alternative to traditional virtual machines and make it possible to handle nested virtualization within Hyper-V.Hyper-V Containers can be managed using Docker or via newWindows PowerShell cmdlets. In the case of Docker management, containers can be administered from the Docker CLI (command-line interface) using the same commands currently used to create and run Docker containers on Linux.