Introduction to Computer for Intermediate

This LECTURE NOTE was prepared for Africans and Nigerians in particular who wants to have general introduction on computer. It will help year one students at the tertiary institutions. Lecturers can also use it as their lecture note. It is packaged in PDF for easy transmission. Languages used is easy and understandable. It covers the following topics:

Overview and history of Computer

Generations of Computer

Characteristics of Computer

Classification of computers by types

Concept of computer hardware and software

Computer data processing systems

Security and safety procedures within a computer environment

Concept of a computer network and use of the internet.

 

Overview of Computer

According to Wikipedia, A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks.

Computer can also be defined as an electronic device capable of accepting data as input, processing it with a help of instruction called program, brings out the result as output and stores the result for future use.

 

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Lessons

Characteristics of Computer in Detail

Complexity: Standard

The basic Characteristics of computer system are speed, accuracy, diligence, versatility and many more lets us discuss them in details: 1. Speed: – As you know computer can work very fast. It takes only few seconds for calculations that we take hours to complete. You will be surprised to know that computer can perform millions (1,000,000) […]

Classification of Computer Based on Types.

Preview

MAIN COURSE: Introduction to Computer (Part 2). Computers differ based on their data processing abilities. They are classified according to purpose, data handling and functionality. According to purpose, computers are either general purpose or specific purpose. General purpose computers are designed to perform a range of tasks. They have the ability to store numerous programs, […]

Computer Hardware Devices

Computer hardware is the physical components that a computer system requires to function. It encompasses everything with a circuit board that operates within a PC or laptop; including the motherboard, graphics card, CPU (Central Processing Unit), ventilation fans, webcam, power supply, and so on. Although the design of hardware differs between desktop PCs and laptops […]

Computer Networks

Computer Network is Used for everything from accessing the internet or printing a document to downloading an attachment from an email, networks are the backbone of business today. They can refer to a small handful of devices within a single room to millions of devices spread across the entire globe, and can be defined based […]