This document provides an overview of computers, including: 1. It defines a computer as an electronic device that accepts data as input, processes it, and provides the desired output. The basic functions of a computer are input, processing, output, storage, and control. 2. Early calculating devices included the abacus and Napier's bones. Modern computers have evolved from machines like Pascal's calculator through generations using different technologies like vacuum tubes, transistors, integrated circuits, and microprocessors. 3. Computers are classified based on their size and capabilities as microcomputers, minicomputers, mainframes, and supercomputers. The basic components of a computer are the input, output, central processing unit

1. UNIT-I Introduction To Computers

9. CHARACTERISTICS OF COMPUTER

17. Evolution of Computers

23. Generations of Computers

29. Classification of Computer

31. Classification of Computer Microcomputer Supercomputer Mini Computer Mainframes Computer Desktop N/W Servers Laptops Smart phones

37. BASIC ORGANISATION OF COMPUTER

38. CONTROL MEMORY ALU OUTPUT INPUT Basic organisation of computer

45. Components of Computers

48. Types of Memory MEMORY SECONDARY PRIMARY RANDOM ACCESS SEQ.ACESS

58. Magnetic Hard Disk Mechanism

66. Output Devices

69. NUMBER SYSTEM

76. Conversions Decimal to Base N Base N to Decimal Successive Division by N (Remainder Method) Multiplication with power of N

77. Decimal to Binary

80. Decimal to Octal

85. Decimal to Hexa

103. ASSIGNMENT