Hack

A hack implies something clever, something that requires deep knowledge of the system. An example of a hack might be an
extension that automatically positioned the mouse over the 
OK button when an alert popped up. A hack might also be a 
program to automatically anti-alias text in menus. The subset
of hacks involving patches to remove copy protection, etc are
referred to as "kracks".

Hacking

To steal or break into files that you aren't supposed to have access
to. The process of breaking into this information is called 'cracking'.

Half Duplex

A communications channel which transmits data in either direction,
but only one direction at a time  Submitted by: Crzy4you

Halftone

The process in which an image is transformed into an image made
up of many black and white dots. Most of today's desktop publishing
programs are capable of handling the halftone option.

Ham Radio

http://www.youthtech.com/hamradio/intro.htm

Hand Coding

Writing a program in a programming language by hand. Instead of
using  a program or programming tools.  Submitted by: Crzy4you

Handheld

 See PDA

Handle

A nickname that is used online

Handoff

The transfer of an ongoing wireless call from one transmission site to another without disconnecting the call

Handshake

An "agreement" happens when two modems handshake. They
agree on the speed of the connection and confirm the connection.
If your modem has a speaker, it's that loud sound that comes out 
of it.

Hangup

A hangup, also called a hang, is a condition that sometimes occurs when computer programs conflict or do not run properly. The computer seems paralyzed. Clicking the mouse has no effect, regardless of where the arrow or cursor is placed.

Hard Boot

Booting a system from power off. Sometimes a computer which is "locked up," or "frozen," must be turned off and on again to clear the memory before it can be operated.


Hard Bounce

A hard bounce is an e-mail message that has been returned to the sender because the recipient's address is invalid

Hard Copy

A computer text file, or set of data printed out on paper. It's 
considered "hard" because it's something physical that can 
be touched unlike something stored on the hard drive or on
a disk.

Hard Disk

See Hard Drive.

Hard Drive

A device usually located inside the computer that stores the
majority of your computers data. Most hard drives now have
a capacity of 12 gigabytes or more, which is able to store lots
of files, programs, games, etc..

Hard Return

A hard return sends the cursor down to the next line, and is made
by pressing the return key;

Hardware

The parts of a computer system that you directly touch or
use. These items would be the keyboard, mouse, monitor,
etc. Hardware runs hand-in-hand with the computer via 
the cables connected usually in the back or side of the
computer.

Hardwired

Having a direct physical connection, such as by wire or cable


Hashing

Hashing is the transformation of a string of characters into a usually shorter fixed-length value or key that represents the original string. Hashing is used to index and retrieve items in a database because it is faster to find the item using the shorter hashed key than to find it using the original value.


Hashmark

ASCII character 35: # .Also called number sign, because it is used
to stand for "number;" or pound sign.

HDML

A simple language used to define hypertext-like content and applications for hand-held devices with small displays. HDML
is designed to leverage the infrastructure and protocols of the
World Wide Web while providing an efficient markup language
for wireless and other handheld devices. Congruent with the
capabilities and limitations of many handheld devices, HDML's 
focus goes beyond presentation and layout.  HDML provides 
an explicit navigation model which does not rely upon the visual
context required of HTML. As such, HDML offers an efficient
means of providing content via the WWW infrastructure to
handheld devices such as cellular phones, pagers, and 
wireless PDA's   Submitted by - Avery2543

HDTV

Head Crash

This is an incident involving your hard drive that you definitely
don't want happening. A head crash is when the "reading" 
part of the hard drive hits or actually goes through the disk,
usually causing major damage to the hard drive resulting in
loss of data.

Head End

In a local area network, a device that receives signals from each
data station and then retransmits the signals to all the data stations

Header

The area at the top of the page in a word processing document where
you could enter the page number or date, which would then appear on
all the other pages in that specific document.

Heat Sink

A material that collects or dissipates heat

Help Menu

The area in a program where you can turn to in need of help with the
program. Usually in the Help menu there is also an "about" area which
tells who created the program.

Hertz

When referring to a computer, (mega) hertz is how fast the
computer is capable of running. To get even more technical,
it's how many frequencies go by per second, so obviously the
higher the number the faster it is.

HEX

Hexadecimal. The base 16 numbering system, sometimes used as
a short way of representing binary numbers. The digits 0-9 are used,
plus the letters A-F which stand for numbers 10 to 15. The farthest
-right digit is the ones place; the digit next to the left is the 16s place;
the next place to the left is 16^2 = 256, etc. Each place is 16 times 
the place immediately to the right of it

HFS

Stands for "Hierarchical Filing System". It is the system that makes
the one folder in the Macintosh belong inside another folder and so
on.

Hidden File

A file located on your computer that is not intended to be viewed.
The hidden file feature was invented so that some important files
could be hidden without being messed with by the user. With most
file managers now, you can view any hidden files.

Hierarchical Menu

A pull-down menu that has sub-menus. The sub-menus are indicated by arrows. Putting the pointer on the item that has an arrow opens up the sub-menu

Hierarchical Routing

Dividing a network into a hierarchy of smaller networks, and
making each level responsible for its own routing

High-Density Disk

A disk that can carry more information that a standard 800K disk.
A high density disk stores 1.4 megabytes of information.

High Frequency

High Resolution

Describes the capability of a monitor to display crisp text and graphic images that won't give you headaches.

Highlighted

Indicates that an object or text is selected and will be affected by
your next action.

Hit

The access of a file by a user on a server. Every element of a
requested page (graphics, multimedia, etc.) including the HTML
file itself is counted as a hit. For example, if a Web page contains
five graphics, then accessing the page generates six hits. Hits
used to be a method of determining the amount of traffic a Web
site received, however, due to the fact that businesses needed 
to isolate the exact number of times a page was requested (in 
order to charge for advertising), this method was tossed aside 
in lieu counting the actual HTML page requests.

Home Key

The key in some programs that moves the cursor to the beginning
of the current line, or in combination with the control key, moves the cursor to the beginning of the document

HomePage

The first or "front" page on a Web site that serves as the starting
point for navigation. Where the site's information actually begins.
Also known as the Welcome page


Hop

In communications routing, a transmission from one network node
to another. A message sent over a long distance may need to make
a series of hops to get from its source to its destination

Horizontal Scroll Bar

A thin strip that appears on the bottom of a window, used for scrolling
the contents of a window left or right. Horizontal scroll bars appear
when the contents of something can't fit in the width of the window.

Host

A computer connected to a network, that provides data and 
services to other computers

Host Computer

The computer that controls the network and stores the programs and data that the other computers on the network use.

Hostname

This is usually a description of an IP address. For example, an
AOL IP address is usually something like 200-204.ipt.aol.com
which would be the hostname and the IP would be 152.200.204.14.
For every hostname there is an IP, but for every IP there is not
a host name, but for every IP is a computer. (Submitted By: Snapple0)

Hot Key

Any key or combination of keys on the keyboard, that when pushed
at the same time will perform simple or complex actions in a program.

Hot Spot

A hot spot is a small place on the desktop where you click your mouse
to turn on a screen saver or do something similar without having to do
much to get it on.

Hourglass Icon

An image that appears on the screen when your computer is busy
working, which usually appears when you first open a program. By
default, this image is a hourglass.


HTML

Hyper Text Markup Language; the most basic and essential
language to the web. HTML is a scripting language used to 
design websites. It is exactly what it says it is, pure text (ASCII)
file format. (Suggested by: YTCC Guru)

HTTP Hypertext transfer protocol 

The protocol that tells the server what to send to the client, so 
he client can view Web pages, FTP sites, or other areas of the net.

HTTPS

A type of server software which provides the ability for "secure"
transactions to take place on the World Wide Web. If a Web 
site is running off a HTTPS server you can type in HTTPS 
instead of HTTP in the URL section of your browser to enter
into the "secured mode".  

HUB

A common connection point for devices in a network. Hubs are
commonly used to connect segments of a LAN. A hub contains
multiple ports. When a packet arrives at one port, it is copied to
the other ports so that all segments of the LAN can see all packets. 
Submitted by- zebrs

HyperCard

A program that let's non-programmers create their own games, 
simple databases, and other things without being a total whiz.

Hyperlink 

The text you find on a Web site which can be "clicked on" with
a mouse which in turn will take you to another Web page or a 
different area of the same Web page. Hyperlinks are created
or "coded" in HTML.    Submitted by:  Hlpmeplese

Hypertext

A system of writing text that enables the text to be linked in multiple
ways, to be available at several levels of detail, and to contain links 
to related documents. The World Wide Web uses hypertext transfer
protocol (HTTP) to provide links to pages and multimedia files.