Hacker - A
person who maliciously steal
data. Some words associated with hackers - warez, crakz, hakz, crack, crackers.
Click here to
see an in depth article about hackers.
Half Duplex - A data transmission
method in which sending and receiving of data occurs but not at the same time.
Haptic Feedback Touch Screen - A touch
screen display that feels like you are pressing real buttons. This effect is
made possible by a small motor like the one that vibrates a cell phone.
Hard Disk - The electronic storage device
inside of a computer. This is were all data is stored for later retrieval.
Inside of it there is a "platter". Looks like a cd. There is also
a "head" that
moves across the platter reading and writing data. Looks very similar to a
record player. These devices are very sensitive to vibrations. One good bump
while the head is operating can trash a hard drive by causing "bad sectors". DVR
satellite TV systems utilize a hard drive.
Here is a guide to buying hard drives.
Hardware - Any of the mechanical or
electrical devices of a computer system.
Headend - The central communications
center for a broadband network.
HDLC - High Level Data Link Control.
HDTV - High Definition Television. A
television system with increased screen resolution.
information on how to install a HDTV antenna for local HDTV reception.
Heat sink - A metal fixture (usually
composed of aluminum) that is installed on top of a cpu to transfer heat from
the processor to a fan, thus cooling the chip.
Click here for a tutorial on changing the heat sink.
Hertz - A measurement of frequency which
equals one cycle per second. Abbreviated Hz.
Hex - Short for Hexadecimal
Hiperwall - An array of multiple hi
definition screens that can display one picture. Currently used by first
responders and research scientist.
Holographic Drive - Using lasers and
mirrors, holographic discs write at speeds four times faster than blue-ray
disks. The gel material is durable enough to last up to 50 years. Maxell's first
commercial production of the disks will hold 300 gigabytes. Expect 1.6 terabytes
by 2010 and may reach 100 terabytes.
Horsepower - A unit of measurement for
motor power. One HP equals 33000 ft-lb per minute.
Hot Swap - Refers to swapping out a
computer device without shutting it down. Good example would be swapping disk
drives out on a laptop.
HTML - Hyper Text Markup Language. This is
the "code" that web pages use to display web pages. To see that code,
click on view in a browser, then source. Writing web pages does not require
expensive software. All that is needed is Microsoft Notepad to write any style of page
desired. Latest standard is 4.01. More information can be found at W3.org.
Here is an article
on html basics.
HTTP - Hyper Text Transfer Protocol. This
identifier is at the beginning of every single web page.
Hyperlink - A image or text that can be
clicked on to carry the user to a specific location such as a web address or a
specific location in a document.