learn computer
Characteristics of a computer
Speed A computer works with much higher speed and accuracy compared to humans while performing mathematical calculations. Computers can process millions (1,000,000) of instructions per second. The time taken by computers for their operations is microseconds and nanoseconds. Accuracy Computers perform calculations with 100% accuracy. Errors may occur due to data inconsistency or inaccuracy. Diligence […]
ASCII and Unicode
ASCII defines 128 characters, which map to the numbers 0–127. Unicode defines (less than) 221 characters, which, similarly, map to numbers 0–221 (though not all numbers are currently assigned, and some are reserved). Unicode is a superset of ASCII, and the numbers 0–127 have the same meaning in ASCII as they have in Unicode. For […]
History of Computer
Babbage’s Analytic Engine (Charles Babbage)-1833
Mechanical, digital, genral purpose
Was crank-driven
Could store instruction
Could perform mathatical calculation
Had ability to print
Store data with Punch Card
Types of computer
Analog Computer An analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena Digital Computer A Digital Computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system. Hybrid Computer Hybrid computers are computers that exhibit features of analog computers and digital […]
Types of Computer Languages
Machine language Assembly Language High Level Language
Basics of programming
Approaches to Problem Solving Concept of Algorithm Concept of Flow Charts Assembler, Compiler, Interpreter, Linker, Loader
Number System
Binary Decimal Octal Hexa Decimal Binary Some content. Decimal Some content in menu 1. Octal Some content in menu 2. Hexa Decimal Some content in menu 2.
Introduction to Operating System
Operating System An Operating System (OS) is System Software. It is an interface between a computer user and computer hardware.It performs many tasks such as File management Lorem ipsum dolor sit amet, consectetur adipisicing elit Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris… Memory Management Lorem ipsum dolor sit amet, consectetur adipisicing elit.Ut […]
Basic Operations of Computer
Basic Operations or Functional Components of Computer Computer Organisation/Block diagram of computer Input: This is the process of entering data and programs into the computer system. Input devices areKeyboard.,Image scanner,Microphone,Pointing device, Graphics tablet, Joystick, Light pen, Mouse, Optical, Pointing stick, Touchpad, Touchscreen, Trackball,Webcam, Softcam etc. Control Unit (CU): The process of input, output, processingand storage […]
Introduction to Digital Computer
There are four types of digital computer…. Super Computer Mainframe Computer Mini Computer Micro Compute Super Computer A Supercomputer is used for super complex task such as Weather Forecasting, Nuclear Simulation etc. The first Supercomputer is introduced in 1976. CRAY 1 is first Supercomputer. Main Frame Mainframe computers are computers used primarily by large organizations […]
