BOOKSFirst edition
BECE study series
Computing
Textbook
Understand the ideas. Build your confidence.
Computing
Understand the ideas. Build your confidence.
Textbook · First edition
A preview of your next chapter. This sample contains selected pages. Explore the full edition in the AllgiftPrep bookshop.
Published by AllgiftPrep.
This edition is an independent learning resource. It does not represent an official examination-board publication or endorsement.
Who this edition is for: learners working through the Basic 7–9 curriculum lesson by lesson, with practice after each lesson.
Digital copies are supplied for the purchasing account. Print or digital classroom redistribution requires a separate agreement. Online videos are optional supplementary resources provided by their respective creators; the printed links are managed by AllgiftPrep so they can be kept working.
Contents
Computer Fundamentals
What a computer is and what makes it useful, the generations and types of computers, the information processing cycle, and how ICT is used in school and society.
Curriculum learning focus
B7, B8, B9 Computing. Explain computer systems and use suitable, accessible tools to solve a real classroom or community problem.
Use the explanations, worked examples and practice below. Where a task requires software or equipment, keep the saved work and a short test record. A written description and an observed practical performance are different kinds of evidence.
This unit introduces the topic. Study the linked subtopics for the detailed teaching and practical tasks. The curriculum reading routes in the book show where each grade revisits the topic.
Computer fundamentals: overview
A computer is an electronic device that accepts data, processes it according to stored instructions, stores the result and produces information as output. Computing is the first strand of the GES JHS Computing curriculum, and it supplies the vocabulary every other topic depends on. (GES Strand: Introduction to Computing.)
Figure 1.1 · The information processing cycle. AI-generated educational reconstruction; labels and models illustrate the lesson.
What this topic covers
- Definition and characteristics — speed, accuracy, storage, diligence, versatility and automation; why a computer makes a worker more productive.
- Types and generations — first to fifth generation (valves, transistors, integrated circuits, microprocessors, artificial intelligence); supercomputers, mainframes, minicomputers and microcomputers.
- Data, information and the processing cycle — input, processing, storage and output; the difference between raw data and meaningful information.
- Uses of ICT — in education, business, health, banking, communication and entertainment.
- ICT tools and terminology — the everyday devices and the acronyms (ICT, DVD, CPU, RAM, USB) that BECE asks you to write in full.
Why it matters
Every later topic — hardware, storage, the operating system, applications and the Internet — uses these words precisely. A student who confuses data with information, or a device with a program, loses marks in questions that are otherwise easy.
For example, the marks a teacher types into a computer are data; the class list sorted by position with averages is information. A flash drive is hardware; the antivirus that scans it is software. Keeping each pair of words apart is the habit this topic builds.
More examples
A shop till. The cashier scans items (input), the till adds the prices (processing), keeps a record of the sale (storage) and prints a receipt (output). Every stage of the cycle happens in a few seconds.
A school results day. Hundreds of report cards are produced in an afternoon instead of a week: this is the speed and diligence of a computer.
Mobile money. Sending money with a phone uses ICT in business: the phone, the mobile network and the software that keeps the account all work together.
An acronym question. “Write CPU in full” earns a mark only for Central Processing Unit, spelled correctly. Saying what it does is not enough.
How BECE asks it
Paper 1: three to five questions — the generation identified by a named technology, the meaning of data, which device suits a stated classroom task, and the benefit of using a computer. Paper 2: write acronyms in full, explain a term such as data, and state uses of ICT in a described situation.
AI-generated educational reconstruction; scenes, interfaces and models are illustrative.
Definition and characteristics of a computer
What a computer is, the characteristics that make it useful, and the difference between a computer and other technology.
Curriculum learning focus
B7 Computing. Explain computer systems and use suitable, accessible tools to solve a real classroom or community problem.
Use the explanations, worked examples and practice below. Where a task requires software or equipment, keep the saved work and a short test record. A written description and an observed practical performance are different kinds of evidence.
Curriculum reading references: B7.1.1.1.1. Related earlier ICT questions are retained as useful revision. These references identify relevant learning, not official certification of the lesson.
Learning objectives
By the end of this lesson you should be able to:
- Define a computer as an electronic device that accepts, processes, stores and outputs data
- State the characteristics of computers
- Explain why computers still need humans
Definition and characteristics of a computer
A computer is an electronic device that accepts data as input, processes it under the control of stored instructions (a program), stores data and instructions, and produces information as output. The word technology is wider: it is the application of science and scientific knowledge to everyday life, of which computing is one part.
Figure 1.2 · Parts of a computer system. AI-generated educational reconstruction; labels and models illustrate the lesson.
Characteristics of a computer
- Speed — millions of operations a second.
- Accuracy — it does not make mistakes of its own; wrong output comes from wrong input or wrong instructions (garbage in, garbage out).
- Storage — it keeps large amounts of data for later use.
- Diligence — it does not tire, get bored or lose concentration when repeating a task.
- Versatility — the same machine types a letter, plays music and calculates results.
- Automation — once started, it can complete a job without a person at each step.
Examples make each word clear. Speed: a spreadsheet totals 1,000 marks in less than a second. Accuracy: it never miscounts change, but if 5 is typed instead of 50 the answer is wrong (garbage in, garbage out). Storage: one flash drive can hold every class note for three years. Diligence: it prints the 500th certificate as neatly as the first. Versatility: the same laptop types a letter, plays a video and joins a video call. Automation: a printer prints all 40 pages once Print is clicked.
Figure 1.3 · Characteristics of a computer. AI-generated educational reconstruction; labels and models illustrate the lesson.
What a computer is not
A computer has no intelligence of its own in the ordinary sense: it follows instructions. It cannot decide what is right, and it depends on power and on correct input. These limitations are as examinable as the strengths.
A computer cannot think for itself, feel, or decide whether an instruction is sensible. It stops when the power fails unless a UPS is fitted, and it is only as good as the program and data it is given.
Why it makes users productive
Because it is fast, accurate and tireless, a worker finishes more work of better quality in the same time. That is why offices, schools, banks and hospitals use computers.
More examples
Which characteristic? A bank computer works through the night updating every account without a mistake — diligence and accuracy.
Why productive? A secretary who once typed five letters a day can now produce fifty personalised letters with mail merge.
Technology versus computing. A borehole pump, a mobile phone and a solar lantern are all technology — science applied to daily life. A computer is one kind of technology.
Multimedia. Software that teaches with sound, pictures and video, like a short animated science lesson, is called multimedia.
How BECE asks it
Paper 1: complete a sentence such as “working with the computer makes a user more …”, or identify which option is not a characteristic. Paper 2: define a computer, or state three characteristics with a short explanation of each.
AI-generated educational reconstruction; scenes, interfaces and models are illustrative.