Computer Studies Scheme of Work for SS1 First Term
SCHEME OF WORK
WEEK 1 OVERVIEW OF A COMPUTER SYSTEM
WEEK 2: HISTORY OF COMPUTER
WEEK 3 HISTORY OF COMPUTER II
WEEK 4 INPUT DEVICES
WEEK 5 BASIC FUNCTIONS AND USES OF COMPUTER
WEEK 6 BASIC COMPUTER LANGUAGE
WEEK 7 COMPUTER HARDWARE AND SOFTWARE: SS1 FIRST TERM COMPUTER SCIENCE
WEEK 8 SS1 COMPUTER SCIENCE FIRST TERM: COMPUTER OUTPUT DEVICES
WEEK 9 OUTPUT DEVICES (PRINTER): SS1 FIRST TERM COMPUTER SCIENCE
Below are the 2022 complete SS1 First Term Computer Science Lesson Note
First Term SS1 Computer Science Lesson Note
Topic: Overview of a Computer System
What is a computer?
Constituents of a computer
Characteristics of a computer
What is a Computer?
A computer is a mechanical programs machine that accepts data as input, store and manipulates the data through instructions in order to give output as information.
A Computer is an electronic device known to be a very powerful tool for processing data into meaning information in a faster, neater and cheaper form. The Computer System is one that is able to take a set of inputs, process them and create a set of outputs.
A Computer is a general-purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem. Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU), and some form of memory. To learn more, Click here.
Topic: History of Computer
The development of the first counting device has been dated to ancient times, a man called abacus used a counting device about 3000 years ago and from this time and man has continued to improve. Ancient methods of counting were through the use of fingers, stones, sticks and grains.
The history of computer science began long before the modern discipline of computer science that emerged in the 20th century, and hinted at in the centuries prior.The progression, from mechanical inventions and mathematical theories towards the modern computer concepts and machines, formed a major academic field and the basis of a massive worldwide industry.
The earliest known tool for use in computation was the abacus, developed in period 2700–2300 BCE in Summer . To learn more, Click here.
Topic: History of computer II
(iii) Third Generation (1964-1977) : By the development of a small chip consisting of the capacity of the 300 transistors. These Integrated Circuits (IC) are popularly known as Chips. A single IC has many transistors, registers and capacitors built on a single thin slice of silicon. So it is quite obvious that the size of the computer got further reduced. Some of the computers developed during this period were IBM-360, IBM-370, and VAX-750. Higher level language such as BASIC (Beginners All purpose Symbolic Instruction Code) was developed during this period. Computers of this generation were small in size, low cost, large memory and processing speed is very high. Very soon ICs Were replaced by LSI (Large Scale Integration), which consisted about 100 components. An IC containing about 100 components is called LSI. To learn more, Click here.
Topic: Input Devices
Input devices are equipment used to get instructions into the computer. It takes in data (facts) and instructions in a suitable form.
Types of input devices
- Card reader
- Light pen
- Digital camera e.t.c
- Keyboard: This is the most important input device used when working with a computer. It is used to type instructions that direct the computer on what task to perform. There are four types of keys on the keyboard. To learn more, Click here.
Topic: Basic Functions and Uses
Basic Functions of a Computer
Uses of a Computer
BASIC FUNCTIONS OF A COMPUTER
All computers, from the smallest handheld computer to the largest supercomputer, perform the same basic functions with digital information. Those functions are:
- Input – Receiving or accepting information from outside sources. The most common way of performing this function is through the information entered through the keyboard and the click of mouse. Typing characters at a keyboard, moving the mouse around the screen or speaking to a computer.
- Output – The results of the processing are made available for use by any user or other devices. The most common ways of producing such outputs are through computer monitor, speakers, and printers. When a computer is connected to other devices, including through Internet, this output is in the form of electrical pulses. Displaying characters or pictures on the screen, printing a research paper, or sending an e-mail message. To learn more, Click here.
Topic: BASIC LANGUAGE
BASIC LANGUAGE/SIMPLE LANGUAGE
A computer language is a special language understood by a computer. It consists of various commands that we give to the computer to do any work.
BASIC (an acronym for Beginner’s All-purpose Symbolic Instruction Code) is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use.
A computer language is a set of words, symbols and codes that are used to write a computer program. The process of writing these instructions (program) is called PROGRAMMING. The people who write these programs are called PROGRAMMERS.
Human beings understand a variety of spoken languages (English, Hausa, Igbo and so on) but computers cannot understand these languages. A computer can only understand on language, that is the machine language. To learn more, Click here.
Computer Hardware are the physical elements or the equipment of the computer. Examples include the keyboard, monitor, mouse and the processing unit etc. In other words, Computer Hardware is the physical components of a computer which can be touched and felt. They are tangible. On the other hand however, Computer Software “is that part of a computer system that consists of data or computer instructions, in contrast to the physical hardware from which the system is built. In computer science and software engineering, computer software is all information processed by computer systems, programs and data. Computer software includes computer programs, libraries and related non-executable data, such as online documentation or digital media. Computer hardware and software require each other and neither can be realistically used on its own.” To learn more, Click here.
DEFINITION OF COMPUTER OUTPUT DEVICES
Computer Output Devices are various types of computer hardware which uses data and commands from the computer itself to perform assigned tasks. In other words, the output devices facilitate data processing by carrying out commands given by the computer. They convert electronically-generated information into human-readable forms.
TYPES OF OUTPUT DEVICES:
There are three types of output devices. These are discussed below-
Graphics Output (Visual): This is an output device that enables graphical contents to be displayed for viewing; usually on screen. These contents could be texts, images or moving pictures (videos). Please note that prior to being displayed on your computer screen, graphic files are stored on your computer, and they do not have physical size until they are displayed on screen or printed on paper. In this light, therefore, graphics output devices are important for the wholesome use of the computer system. To learn more, Click here.
WHAT IS A PRINTER?
A printer can be defined as an external output device that facilitates the production of electronic data into hard copy formats. In other words, a printer will enable you to generate a physical (hard copy) file of your document. In various offices and schools, people print several copies of their work reports and assignments using the computer. Indeed, printers are important computer output devices used for printing several types of documents; mainly texts and pictures. There are also various types and variants of printers as you shall see shortly. To learn more, Click here.