Definition of RAM or Rom

Definition of RAM
Random-access memory (RAM) refers to a storage technology that allows you to read and write data as many times as needed. Contrast this to ROM which allows data to be written once after which it permits only reading.
RAM is typically erased when a computer is shut down, though some RAM chips maintain data indefinitely without electrical power. Technically, RAM devices are not limited to memory chips, and random-access memory as a storage format is not limited to use as working memory. In a broad sense, modern storage devices for long-term or secondary storage, including magnetic media and laser-readable CDs and DVDs, are forms of random-access memory.

Rom

Read-only memory (ROM) refers to a storage technology that allows you to write data only once. After the data has been written, you can read it an unlimited number of times. Contrast this with random-access memory (RAM) that allows you to read and write data as many times as needed.
Originally, the term ROM referred to memory chips. However, with the creation of other stored devices, the term is being used more widely. In particular, CD-ROM is used to distinguish CDs that can only be read and not written too.

CPU (central processing unit)

                  Definiton of  CPU
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.
Due to its importance to every computing task, the speed of the CPU, usually measured in gigahertz (GHz) is the number that most vendors use in their marketing campaigns. In the past, the larger the number, the faster the computer could be expected to be. However, in recent years, the speed of the CPU has had less impact as other components of a computer take on more and more of the workload. Also, differences in technology mean that a slower chip that performs more calculations per cycle can actually be faster than a higher rate chip doing fewer calculations per cyc

Desktop CPU

Tower CPU

Monitors Cable

 VGA Cables

Scart to 15 Pin VGA Cable - 2M
Scart to 15 Pin VGA Cable - 2M pretty easily connects devices with SCART OUT to devices with 15-pin HDD IN incorporating a fully functional sync separator and amplifier.

S-Video Cables

VGA to TV Converter S-Video & RCA Out Cable Adapter (4 Converter)

Make use of this useful VGA to TV Converter S-Video & RCA Out Cable Adapter (4 Converter) capable of working with laptops; TV’s and projectors that have VGA cards with TV-Out function capability through the VGA connector.

 

2 Monitor to 1 PC VGA Y Splitter Cable

2 Monitor to 1 PC VGA Y Splitter Cable makes room for easy video sharing and is a perfect choice to make one if you have to make those presentations quite often.

kinds of monitor

 All About Computer Monitors

Monitors are visual output devices that display computer-generated images. If you were to open up a computer monitor, you would find complex wiring and circuitry, which aid your computer in generating visual outputs.
Monitors are critical to any kind of computer work, because without them,
computer users could not see the work they are performing.
Different Types of Monitors

There are many types of computer monitors from which to choose. The ideal monitor for you is probably the model that best suits your needs in terms of video in/outputs, and hdtv and bluray compatibility. 

CRT Monitors

Some computer monitors generate output with the help of cathode
ray tubes. This type of device is called the CRT (or, cathode ray
tube) monitor. Some computer users prefer this style because it
offers a richly colored display and does not break easily. However,
CRT monitors can be bulky and take up a lot of desk space, very
heavy to carry, and they require a lot of power to run properly.
Moreover, the picture screen can distort, display a "flicker effect,"
or burn out over time.

Flatscreen(CRT) Monitors

Basically a CRT monitor with a better picture and a
slimmer space-saving form factor. Colors and sharpness
may be improved from the basic CRT depending on the
resolution of the monitor.

 LCD Monitors


Liquid crystal display (LCD)
monitor is the latest
development in monitor
technology. LCD and plasma
screen styles are relatively thinner and much lighter than their older
CRT counterparts. They display sharp, excellent images and require
less power to run, thus let you save money in energy costs. However,
these newer models can be more expensive than traditional computer
monitors. LCD screens have been used in laptops for a while but have
only recently become popular as desktop monitors.

Monitor

What is a Monitor?:

The monitor displays the video and graphics information generated by the computer through the video Card. Monitors are very similar to televisions but display information at a much higher quality.

The Monitor is Also Known As:

screen, display, video display, video screen

Important Monitor Facts:

A monitor, no matter the type, connects to either a VGA or DVI port on a video card. Before investing in a new monitor, make sure that both devices support the same type of connection.

Monitors are not typically user serviceable. For your safety, it's not usually wise to open and work on a monitor.

Popular Monitor Manufacturers:

Acer, Hanns-G, LG Electronics, Sceptre

Monitor Description:

Monitors are display devices external to the computer case and connect via a cable to a port on the video card. Even though the monitor sits outside the main computer housing, it is an