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CLASSIFICATION OF COMPUTERS 1 - ACCORDING TO TYPES, SIZES, AND PURPOSES (JS2) NOTE

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  CLASSIFICATION OF COMPUTER SYSTEM ACCORDING TO TYPES, SIZES AND PURPOSES Objectives: Student should be able to state 1.     Classification of computers by types 2. Classification of computers by sizes Classification Of Computers By Types Types of computers are: (i)                 Analog Computer (ii) Digital computer (iii) Hybrid computer (i)                 Analog Computer: This computer uses continuous physical phenomena such as electrical, mechanical or hydraulic quantities to solve problems. Examples are thermometer, speedometer, old radios e.t.c (ii)               Digital computer: This computer performs calculations and logical operations with quantities represented as digits, usually in the binary system (0’s and 1’s). Examples are PC (personal computer), calculators, digital clock, digital cameras e.t.c (iii)         ...
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GENERATION OF COMPUTERS - 1ST -5TH GENERATION (JS1 NOTE)

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GENERATIONS OF COMPUTERS 1ST, 2ND, 3RD, 4TH, AND 5TH GENERATIONS FEATURES/CHARACTERISTICS Objective: At the end of the lesson, the students should be able to 1. List generation of computers 2. Describe the features of each generation INTRODUCTION These refer to the computer’s technical progress since the development of the first electronic computer. There are a total of five computer generations till date. They are: (i)                 First generation computers (1940-1959) (ii)               Second generation computers (1960-1965) (iii)             Third generation computers (1965-1970) (iv)             Fourth generation computers (1972-1990) (v)               Fifth  generation computers (1990 till date)   (i)                 First generation computers (1940-1959) (a) ...
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THE MEMORY UNIT- PRIMARY AND SECONDARY STORAGE- SS2 NOTE

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 THE MEMORY UNIT 1 DEFINITION AND TYPES-  PRIMARY AND SECONDARY STORAGE DEFINITION OF COMPUTER MEMORY i. This is the storage location where data, programs, and information are stored. ii. The memory unit is part of the computer that holds data and instructions for processing. iii. It may also be defined as the storage space in the computer where data to be processed and instructions required for processing are stored.  Although closely associated with the central processing unit, memory is separated from it. Types of Memories in Computer The Computer Memory is of two types, they are a. Primary memory/main memory/internal memory b. Secondary memory/auxiliary memory/external memory a. Primary Memory:  The primary memory is the memory that can be directly accessed by the CPU, the CPU constantly interact with it, reads instructions stored there and executes them as required. Types of Primary memory There are two types of primary memory: i. RAM ii. ROM (i) RAM (Random Acc...
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