Page 83 - TP_IT_V1.0_C9_flipbpookl
P. 83
Web Camera
A web camera or webcam, is a type of video camera that saves images or visuals in real time into
a computer via USB, Ethernet or Wi-Fi. A web camera is used to create video links and helps us to
set up authentic video conference stations. Some built-in webcams can be remotely activated from
far-off locations. Webcams can also be used for security and surveillance purposes by monitoring
the captured visuals.
Web Camera
PROCESSING DEVICE—CENTRAL PROCESSING UNIT (CPU)
After taking the input from the input devices, the information is sent for processing. The computer uses its brain to
process the information. The computer's brain is called the CPU or Central Processing Unit. CPU is basically divided into
three parts:
• ALU stands for Arithmetic Logic Unit. It is responsible for all arithmetical and logical
calculations.
• CU stands for Control Unit. It controls the flow of information in the system. The control
unit is responsible for the flow of data from input devices to the processing unit and then
to the output devices. It works like a traffic policeman who controls the traffic on the road.
• MU stands for Memory Unit. It is a storage unit that holds the processed or unprocessed
CPU Chip data.
OUTPUT DEVICES
An output device is a physical component that converts the processed data or information into a human readable format.
Some of the commonly used output devices are:
Monitor (Visual Display Unit)
A monitor is a standard output device that is similar to a television screen. It is also known
as Visual Display Unit (VDU) or console. An input from any input device such as a keyboard
can be seen on the screen simultaneously. There are different types of monitors available
in the market depending on the size and colour. Monitor
These days the most widely used monitors in computers, tablets, smartphones, Smart TV, etc. are LCD (Liquid Crystal
Display). Its screen is made up of smaller elements called pixels. Resolution of any display unit is the number of
horizontal and vertical pixels. A higher resolution provides a smoother, sharper, and clearer image.
Printer
A printer is an output device that is used to get the output on a physical medium like paper. The output on the screen
is called a soft copy, whereas the output from the printer is called a hard copy. It can be used to print both text and
graphics. The two most common types of printers used these days are inkjet and laser printers.
Inkjet Printer
Inkjet printers are also called photo printers. They are used to print both in coloured
or black & white format for home or small business purposes. The speed of an
inkjet printer is measured by the number of Pages Per Minute (PPM). Mostly Inkjet
printers print 12 to 36 pages per minute.
Inkjet Printer
ICT Skills-I 81

