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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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) […]
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 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 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 […]