Introduction to Computer.pptx
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Computer is an electronic device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programs. The main components of a computer are the input, output, processing, and storage units. The central processing unit (CPU) controls all other components and processes data through its arithmetic logic unit and control unit. Primary memory, such as RAM and ROM, allows for temporary and permanent data storage respectively. Secondary memory like hard disks, optical disks, and flash drives provide larger storage capacities.
Introduction to Computer.pptx
- 2. Computer • an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program
- 5. Functionalities of a Computer Any digital computer carries out five functions in gross - Takes data as input. - Stores the data/instructions in its memory and use when required. - Processes the data and converts it into useful information. - Generates the output - Controls all the above four steps
- 6. Computer Components Hardware - computer hardware is the collection of physical elements”Tangible objects”that constitutes a computer system.The actual machinery, wires, transistors, and circuits Software - Computer Programs instructions and data
- 7. Computer Units • Input Unit • Central processing Unit • Primary Memory Unit • Secondary storage Unit • Output Unit
- 8. Input device • Input device is any peripheral (piece of computer hardware equipment to provide data and control signals to an information processing system such as a computer or other information appliance. Input device Translate data from form that humans understand to one that the computer can work with. Most common are keyboard and mouse 8
- 9. • Example of Input Devices KeyboardMouse (pointing device) • Microphone • Touch screen • Scanner • Webcam • Touchpads • MIDI keyboardGraphics TabletsCamerasPen InputVideo Capture cameraJoystickGamepadElectronic Whiteboard
- 10. Central Processing Unit CPUknown as microprocessor or responsible for all functions and
- 11. CPU Components The CPU is comprised of three main parts ALU (Arithmetic Logic Unit)Control Unit (CU)Registers: Stores the data that is to be executed next.
- 12. ALU Executes all arithmetic and logical operations. Arithmetic calculations like as subtraction, multiplication and operation like compare numbers, special characters
- 13. Control Unit (CU)Control Unit (CU): controls and co- ordinates computer components.Read the code for the next instruction to be executed.Increment the program counter so it points to the next instruction.Read whatever data the instruction requires from cells in memory.Provide the necessary data to an ALU or register.If the instruction requires an ALU or specialized hardware to complete, instruct the hardware to perform the requested operation.
- 14. RegistersRegisters: Stores the data that is to be executed next, "very fast storage area".
- 15. Primary Memory1. RAM.2.ROM • 1. RAM: Random Access Memory: is a memory scheme within the computer system responsible for storing data on a temporary basis, so that it can be promptly accessed by the processor as and when needed.It is volatile in nature, which means that data will be erased once supply to the storage device is turned off.RAM stores data randomly and the processor accesses these data randomly from the RAM storage.RAM is considered "random access" because you can access any memory cell directly if you know the row and column that intersect at that cell.
- 16. • 2. ROM (Read Only Memory): ROM is a permanent form of storage. ROM stays active regardless of whether power supply to it is turned on or off. ROM devices do not allow data stored on them to be modified.
- 17. Secondary Memory Stores data and programs permanently its retained after the power is turned Main Examples : Hard Disk Optical Disk Flash memory
- 18. Hard Disk Called Disk drive or HDD stores and provides relatively quick large amounts of data. Stores data electromagnetically charged surface surfaces.
- 19. Optical Disk & Flash an optical disc drive (ODD) is a disk drive that uses laser light to store data. There are three main types of optical media: CD, DVD, and Blu- ray disc - CD “Compact Disk” can store up to 700MBDVD “ - Digital Video Disk “ can store up to 8.4 - GBBlu-ray disc. can store up to 50 GB
- 20. Computer Title To start a presentation, go to the Slide Show tab, and select From Beginning. Title To display Presenter view, in Slide Show view, on the control bar at the bottom left select the three dots, and then Show Presenter View. Title During your presentation, the speaker notes are visible on your monitor, but aren't visible to the audience. Title The Notes pane is a box that appears below each slide. Tap it to add notes. Title If you don’t see the Notes pane or it is completely minimized, click Notes on the task bar across the bottom of the PowerPoint window.
- 22. Content 2 SUBTITLE SUBTITLE SUBTITLE
- 23. Summary
- 24. Thank You