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CPU
n:
Definition:
The CPU (central processing unit) is the part of a computer controls the interpretation and execution of instructions.
Generally, the CPU is a single microchip, but that doesn't necessarily have to be the case. In the consumer desktop
and laptop market, the CPU market is dominated by Intel, AMD, and IBM. These manufacturers supply the computer
makers such as Dell, HP, and Apple.
Hard Drive
Definition:
The hard drive is what stores all your data. It houses the hard disk, where all your files and folders are
physically located. A typical hard drive is only slightly larger than your hand, yet can hold over 100 GB of
data. The data is stored on a stack of disks that are mounted inside a solid encasement. These disks spin
extremely fast (typically at either 5400 or 7200 RPM) so that data can be accessed immediately from
anywhere on the drive. The data is stored on the hard drive magnetically, so it stays on the drive even
after the power supply is turned off.
Video Card
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Definition:
A video card, video adapter, graphics accelerator card, display adapter, or graphics card is
an expansion card whose function is to generate output images to a display. Most video cards
offer added functions, such as accelerated rendering of 3D scenes and 2D graphics, video
capture, TV-tuner adapter, MPEG-2/MPEG-4 decoding, FireWire, light pen, TV output, or the
ability to connect multiple monitors (multi-monitor). Other modern high performance video
cards are used for more graphically demanding purposes, such as PC games.
Keyboard
Defintition:
In computing, a keyboard is a typewriter keyboard, which uses an arrangement of buttons or
keys, to act as mechanical levers or electronic switches. With the decline of punch cards and
paper tape, interaction via teletype-style keyboards became the main input device for computers.
A keyboard typically has characters engraved or printed on the keys and each press of a key
typically corresponds to a single written symbol. However, to produce some symbols requires
pressing and holding several keys simultaneously or in sequence. While most keyboard keys
produce letters, numbers or signs (characters), other keys or simultaneous key presses can
produce actions or computer commands.
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Monitor
Definition:
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The term "monitor" is often used synonymously with "computer screen" or "display." The monitor
displays the computer's user interface and open programs, allowing the user to interact with the
computer, typically using the keyboard and mouse.
Mouse
Definition:
a hand-operated electronic device that controls the coordinates of a cursor on your computer screen as
you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad; "a
mouse takes much more room than a trackball"
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Power supply
Definition:
A power supply unit (PSU) is the component that supplies power to the other components in a
computer. More specifically, a power supply unit is typically designed to convert generalpurpose alternating current (AC) electric power from the mains (110-120V in North America,
parts of South America, Japan, and Taiwan; 220-240V in most of the rest of the world) to usable
low-voltage direct current (DC) power for the internal components of the computer. Some power
supplies have a switch to change between 230 V and 115 V. Other models have automatic
sensors that switch input voltage automatically, or are able to accept any voltage between those
limits.
Network Card
Definition:
A network interface controller (also known as a network interface card, network adapter,
LAN adapter and by similar terms) is a computer hardware component that connects a computer
to a computer network.
Mother bored
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Definition:
In personal computers, a motherboard is the central printed circuit board (PCB) in many
modern computers and holds many of the crucial components of the system, while providing
connectors for other peripherals. The motherboard is sometimes alternatively known as the
mainboard, system board, or, on Apple computers, the logic board.[1] It is also sometimes
casually shortened to mobo.[2]
RAM
Random-access memory (RAM) is a form of computer data storage. Today, it takes the form of
integrated circuits that allow stored data to be accessed in any order in a constant time, regardless
of its physical location and whether it is related to the previous piece of data.[1] RAM is often
associated with volatile types of memory (such as DRAM memory modules), where its stored
information is lost if the power is removed. Many other types of non-volatile memory are RAM
as well, including most types of ROM and a type of flash memory called NOR-Flash. The first
RAM modules to come into the market were created in 1951 and were sold until the late 1960s
and early 1970s. However, other memory devices (magnetic tapes, disks) can access the storage
data in a predetermined order, because mechanical designs only allow this.
Cache
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Definition:
In computer engineering, a cache ( /ˈkæʃ/ kash or Aust/NZ: /keɪʃ/ kaysh) is a component that
transparently stores data so that future requests for that data can be served faster. The data that is
stored within a cache might be values that have been computed earlier or duplicates of original
values that are stored elsewhere. If requested data is contained in the cache (cache hit), this
request can be served by simply reading the cache, which is comparatively faster. Otherwise
(cache miss), the data has to be recomputed or fetched from its original storage location, which is
comparatively slower. Hence, the more requests can be served from the cache the faster the
overall system performance is.
Flash Drive
Definition:
A flash drive is a small, ultra-portable storage device which, unlike a hard drive or optical drive, has
no moving parts. Most connect to the PC via a built-in USB port. Storage capacity ranges from as
small as 16MB to as much as 64GB and more.
SD Card
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Definition:
A flash memory card that provides storage for digital cameras, cellphones and PDAs.
Introduced in 1999 by Panasonic, Toshiba and SanDisk, cards up to 64GB are available with
much higher capacities expected in the future (see SDXC below). By 2007, it became the
most popular format for point-and-shoot, digital cameras.
HDMI Port
Definition:
HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for
transmitting uncompressed digital data.[1] It is a digital alternative to consumer analog standards,
such as radio frequency (RF) coaxial cable, composite video, S-Video, SCART, component
video, D-Terminal, or VGA. HDMI connects digital audio/video sources (such as set-top boxes,
upconvert DVD players, HD DVD players, Blu-ray Disc players, AVCHD camcorders, personal
computers (PCs), video game consoles such as the PlayStation 3 and Xbox 360, and AV
receivers) to compatible digital audio devices, computer monitors, video projectors, and digital
televisions.[1]
Blueray or DVD burner
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Definition:
A DVD recorder (also known as a DVDR, mainly outside of the UK and Ireland), is an
optical disc recorder that records video onto blank writeable DVD media. Such devices
are available as either installable drives for computers or as standalone components for
use in studios or home theater systems.
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