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Digital photo frame is a thin coloured screen in the form of a picture frame. It can store photographs/images
in its memory in the digital format and can be used for slide show presentations.
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.
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 & surveillance purposes by monitoring
the captured visuals.
Do you know?
Biometric Sensor is a device which captures unique information from human body. The unique
information can be fingerprints, iris pattern, etc. It stores and compares to match the information with
the available database.
Processing Device
CPU is the processing device. CPU (Central Processing Unit) is also known as the ‘Brain of a Computer’. As it
appears, it is a hardware component and also an important functional component of a computer system. It
takes information from the input unit or memory and processes it as per the given instructions. Processing
includes calculations, comparisons, decision making, etc.
Functional Elements of a CPU
The functional elements of a CPU can be divided into three parts:
Arithmetic Logic Unit (ALU)
Control Unit CU)
Memory Unit (MU)
Arithmetic Logic Unit (ALU)
ALU performs all logical and arithmetic operations. ALU performs arithmetic calculations (addition, subtraction,
division, multiplication, etc.) and does logical comparisons (greater than(>), less than(<), equal to (=), not equal
to(!=), etc.). ‘Logical Operation’ refers to comparison as it sets the sequence of operations. It differentiates
between ‘TRUE’ and ‘FALSE’. It receives the coded data and manipulates them to produce information in machine
code and then sends them to the Control Unit.
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