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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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