Introduction computer class
- 1. Himabindu K. M.Tech Computer Introduction
- 2. Himabindu K. M.Tech What is Computer ? It is an electronic device which is used to take input from the user and process it, and produces result as output. It is a fast and accurate electronic data processing machine capable of performing arithmetic and logical operations.
- 3. Himabindu K. M.Tech Identification of Peripherals DESKTOP/MONITOR KEYBOARD
- 4. Himabindu K. M.Tech MOUSE CENTRAL PROCESSING UNIT
- 5. Himabindu K. M.Tech How to connect the SYSTEM PLUG BOX MONITOR CPU KEYBOARD MOUSE
- 6. Himabindu K. M.Tech Block diagram of COMPUTER
- 7. Himabindu K. M.Tech INPUT UNIT The data that is given to the computer is called as input. The devices which are used to take input are said to be input devices. Some of the input devices are: Keyboard Mouse Joystick Scanner Webcam Light pen
- 8. Himabindu K. M.Tech CPU stands for Central Processing Unit It carries the task of processing. It can also be called as “Heart” or “Brain” of the computer. It has three sub-units. • ALU ALU stands for Arithmetic and logical unit. It performs all arithmetic operations +, - , * , /), comparison operations (< , >, <=, >=, =) and logical operations (and, or, not) • Control Unit Control Unit controls the processing. It has the data bus to carry the data from one unit to another unit. Control unit also controls all the hardware devices. • Memory Unit Memory unit is used to store the data. It has two units. • Primary Memory • Secondary Memory CPU
- 9. Himabindu K. M.Tech Primary Memory It is used to store the data or program during execution. It has two sub-units: • RAM • ROM RAM (Random Access Memory) : • It is read and write memory • It is a volatile memory i.e., erasable memory (if power goes off or system is switched off the contents of memory will be lost) • It does not have necessary commands to start the computer. ROM (Read Only Memory) • We can just read the data present in this memory but we can not store the data. • It is a non-volatile memory i.e., non-erasable memory (if power goes off or system is switched off the contents of memory will not be lost) • It has necessary commands to start the computer and configuration particulars of all the peripherals.
- 10. Himabindu K. M.Tech Secondary Memory It is a supporting memory for any computer. The information can be stored permanently in this memory. It includes : • Floppy Disk • Hard Disk • CDs • DVDs • Magnetic Disk • Optical Devices • Punched Cards 4 bits = 1 Nibble 8 bits = 1 byte 1024 bytes = 1 Kilo Byte (KB) 1024 KB = 1 Mega Byte (MB) 1024 MB = 1 Giga Byte (GB) 1024 GB = 1 Tera Byte (TB) 1024 TB = 1 Peta Byte 1024 PB = 1 Exa Byte (EB) 1024 EB = 1 Zeta Byte (ZB) 1024 ZB = 1 Yeta Byte (YB)
- 11. Himabindu K. M.Tech Output Devices The information that is received from the computer is an output. The devices which are used to receive output are said to be output devices. Some of the output devices Monitor Printer Speaker Plotter.