INPUT AND OUTPUT DEVICES

copy and paste from  http://en.wikipedia.org





In computing, input/output or I/O is the communication between an information processing system (such as a computer) and the outside world, possibly a human or another information processing system.Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an input or output operation. I/O devices are used by a person (or other system) to communicate with a computer. For instance, a keyboard or a mouse may be an input device for a computer, while monitors and printers are considered output devices for a computer. Devices for communication between computers, such as modems and network cards, typically serve for both input and output.

Types of RAM

THIS IS A COPY PASTE FROM http://www.webopedia.com

There are two different types of RAM:

• DRAM (Dynamic Random Access Memory)
• SRAM (Static Random Access Memory).

The two types of RAM differ in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM.

DRAM supports access times of about 60 nanoseconds, SRAM can give access times as low as 10 nanoseconds. Despite SRAM being faster, it's not as commonly used as DRAM because it's so much more expensive. Both types of RAM are volatile, meaning that they lose their contents when the power is turned off.

MY BIODATA

NAME:                            RASEM SHAH BIN KARAB HUSSAIN
AGE:                               22
DATE OF BIRTH:        28/6/1991
HOMETOWN:              KUALA LUMPUR
STATUS:                      IN A RELATIONSHIP
FAVORITE FOODS:  CHICKEN RICE AND PIZZA
FAVORITE DRINKS: MILO ICE AND SOYA BEANS