Revision sheet: Introduction to Computer Fundamentals

📋 Course Outline

1. Computer description and vocabulary
2. Computer parts and functions
3. Writing computer descriptions
4. What is a computer
5. Computer types and benefits
6. Computer speaking practice
7. Computer safety and setup
8. Computers in medical procedures
9. Both, either, and neither
10. Uses of computers across fields
11. Debating computer benefits and downsides

📖 1. Computer description and vocabulary

🔑 Key Concepts & Definitions

• Overview : A general view that summarizes what a subject includes, without giving every detail.
• Off topic : A statement or information that is not related to the main subject of a conversation or text.
• Central Processing Unit CPU : A processor that executes instructions and performs calculations for the computer.
• Random Access Memory RAM : A memory type that holds temporary data and instructions so the CPU can access them quickly.

📝 Essential Points

• The computer case has the function of housing all the other internal components.
• In a computer, the power supply is located on the bottom.
• The motherboard’s function is to let components communicate with each other.
• The CPU is also called the Central Processing Unit, and it performs calculations and runs programs.
• RAM stores data for quick accessibility, while the hard drive stores data more permanently.
• A graphics card’s function is to display images on the monitor.

💡 Memory Hook

RAM = “R”eady work memory; hard drive = “store” long-term.

📖 2. Computer parts and functions

🔑 Key Concepts & Definitions

• Computer case : A computer case is the outer housing that keeps and contains the main internal components of a desktop computer.
• Power supply : A power supply is the internal component that provides electricity to the computer’s other parts.
• Motherboard : A motherboard is the main board that connects components so they can work together.

📝 Essential Points

• The computer case houses all the other components in a single enclosure.
• The power supply is located at the bottom of the computer and supplies electricity to the other components.
• The motherboard enables components to communicate with each other during operation.
• The CPU is responsible for performing calculations and running programs.
• RAM stores data for quick accessibility, while the hard drive stores data long term.
• The graphics card displays images on the monitor by rendering graphics.

💡 Memory Hook

CPU = brain (runs + calculates); RAM = workspace (quick temporary data); Hard drive = filing cabinet (long-term data).

📖 3. Writing computer descriptions

🔑 Key Concepts & Definitions

• Single adjectives : Single adjectives are used to describe a noun, either directly before it or after link verbs like be, look, or feel.
• General opinion adjectives : General opinion adjectives express a broad judgment and can describe many different nouns.
• Specific opinion adjectives : Specific opinion adjectives are limited to particular types of nouns, such as food, furniture, animals, or people.
• Adjective order : Adjective order is the usual sequence when several adjectives appear before a noun, following fixed categories.

📝 Essential Points

• You can place most single adjectives before a noun or after link verbs like be, look, or feel.
• When using two adjectives, a general opinion adjective usually comes before a specific opinion adjective.
• When using opinion adjectives plus descriptive adjectives, an opinion adjective usually comes in front of the descriptive adjective.
• Using three or more adjectives before a noun is unusual, with the most typical order being: general opinion, specific opinion, size, shape, age, color, nationality, material.
• The normal adjective order for multiple adjectives is: General opinion → Specific opinion → Size → Shape → Age → Color → Nationality → Material.

💡 Memory Hook

General→Specific→Size→Shape→Age→Color→Nation→Material: G-S-S-Sh-A-C-N-M.

📖 4. What is a computer

🔑 Key Concepts & Definitions

• Computer as electronic device : A computer is an electronic device designed to perform information tasks using electronic circuits.
• Input-process-store-output : A computer operates through a cycle where it accepts data, processes it, stores data, and then produces an output.
• Data storage and output : A computer system includes parts that temporarily or permanently store data and then provide results as output.

📝 Essential Points

• A computer accepts data, processes it, stores data, and then produces an output.
• Computers are classified by performance, power, and size.
• In the text, a microcomputer is also called a personal computer and is designed for one user at a time.
• Supercomputers are described as very expensive and very fast.

💡 Memory Hook

Remember the flow: I → Process → Store → Output (IPS O).

📖 5. Computer types and benefits

🔑 Key Concepts & Definitions

• Supercomputer : A supercomputer is an extremely fast but very expensive computer optimized to run a small set of programs at very high speed.
• Mainframe computer : A mainframe computer is a large, expensive computer designed to support thousands of users at the same time for major organizational tasks.
• Minicomputer : A minicomputer is a mid-sized multiprocessing computer that can support roughly 4 to about 200 users simultaneously.
• Microcomputer : A microcomputer, also called a personal computer, is designed for one user at a time and is the most common type because it is inexpensive.

📝 Essential Points

• Supercomputers use thousands of processors and are measured in petaflops of performance, with very high costs limiting them to high-end research settings.
• Tianhe-2 (National Supercomputer Center, Guangzhou) has 3.12 million cores and runs at 33.86 petaflops.
• Mainframe computers rank below supercomputers and are used for bulk data processing, critical applications, and transaction processing.
• Minicomputers have been largely rebranded as midrange computers since microprocessors became common.
• Microcomputers most often appear as desktops and portable computers, with desktops requiring constant power from a power supply while portable devices use a built-in battery.

💡 Memory Hook

Super = Speed, Mainframe = Many users, Mini = 4–200, Micro = One user + Personal.

📖 6. Computer speaking practice

🔑 Key Concepts & Definitions

• Prepositions of place : Prepositions of place are words used to describe where a device or person is located relative to other objects.
• Prepositions of movement : Prepositions of movement are words used to describe how someone or something moves relative to an object or surface.
• Computer technician conversation : A computer technician conversation is a short speaking exchange where a technician helps a person whose computer does not work and suggests solutions.

📝 Essential Points

• Prepositions of place include in, inside, on, over, above, beneath, under, below, on the right of, on the left of, beside or next to or by, in front of, behind, between, opposite or across from, in the middle of, among, in the corner of, and at the edge of.
• You practice prepositions of place by writing 10 location sentences that use the given preposition.
• Prepositions of movement include rolling up, rolling down, flying over, rolling to, rolling away from, rolling past, rolling into, rolling out of, rolling around, getting onto, getting off, rolling across, rolling through, and rolling along.
• You practice prepositions of movement by writing sentences describing the movement shown in 13 pictures.
• The technician speaking task uses prepositions of place and requires recording a 3–5 minute conversation about a broken computer and proposed solutions.

💡 Memory Hook

Place = POSITION (in/on/under/behind), Movement = TRAJECTORY (into/out of/past/around).

📖 7. Computer safety and setup

🔑 Key Concepts & Definitions

• Computer technician : A person who diagnoses why a computer is not working and proposes possible fixes.
• HDD magnetized area : A magnetized region on a hard disk that represents stored information.
• HDD demagnetized area : A demagnetized region on a hard disk that represents the other information state.

📝 Essential Points

• A powerful magnet near a computer hard drive can damage the stored data by interfering with the disk’s magnetization.
• On a hard disk drive, the laser/reading system interprets pits and smooth areas so magnetized versus demagnetized regions correspond to stored states.
• When a computer does not work, the technician helps the user understand the problem and suggests solutions.

💡 Memory Hook

HDD ≈ magnet “on/off”: magnets decide what stays readable; keep magnets away.

📖 8. Computers in medical procedures

📖 9. Both, either, and neither

📖 10. Uses of computers across fields

🔑 Key Concepts & Definitions

• Business computing : Business computing uses computers to manage records, projects, inventory, and internal or external communication with customers and staff.
• Education technology : Education technology uses computers to deliver learning content, enable online exams and remote learning, and support projects and assignments.
• Healthcare computing : Healthcare computing uses computers to store and analyze medical information, monitor patients, and coordinate access to drugs and specialist knowledge.
• Security and surveillance : Security and surveillance uses computers to monitor people and goods and to support identification and access control using other technologies.

📝 Essential Points

• In business, computers store accounts and personnel records, help manage projects and inventory, create reports, and enable e-mail communication.
• In education, computers provide audio-visual packages, interactive exercises, remote tutoring, and access to intranet or internet learning information.
• In healthcare, digitized patient data is stored and analyzed by software, while lab equipment and monitors track heart rate and blood pressure.
• In science, computers support research by collecting, categorizing, analyzing, and storing data, and they help launch and control advanced systems.
• Computers support publishing by designing publications for both hard-copy and e-books, marketing them, and tracking sales.
• In security, computer-linked tools support biometric passports, face recognition, and automatic plate scanning by speed cameras or police cars.

💡 Memory Hook

Think of computers as tools for the chain: Manage (business) → Teach (education) → Heal (healthcare) → Discover (science) → Publish (printing) → Protect (surveillance).

📖 11. Debating computer benefits and downsides

🔑 Key Concepts & Definitions

• Pro-computer guest : A pro-computer guest is a speaker who argues in favor of using computers in everyday life.
• Anti-computer guest : An anti-computer guest is a speaker who argues against using computers in everyday life.
• TV platform discussion : A TV platform discussion is a filmed conversation between a host and two guests about computer benefits and downsides.

📝 Essential Points

• In the debate, one guest supports computer use while the other is against it in everyday life.
• The conversation must be built between the TV host and the two guests.
• Answering listening tasks should use video information, not personal opinions, when the instruction says “according to the video.”

💡 Memory Hook

Pro = Plus (benefits), Anti = Minus (downsides), both talk with the Host on the TV stage.

📊 Synthesis Tables

Computer types (size, users, speed/cost)

Type	Users	Speed/Cost
Supercomputers	—	Very fast; very expensive; optimized for a small number of programs; measured in petaflops
Mainframe computers	Thousands	Large and expensive; supports thousands of users simultaneously
Minicomputers (midrange computers)	4 to about 200	Mid-sized; multiprocessing system; ranked below mainframes
Microcomputers (personal computers)	One user	Most common; designed for one user at a time; inexpensive

⚠️ Common Pitfalls & Confusions

1. Mixing up RAM and hard drive functions: RAM is temporary working memory for quick access, while the hard drive stores data long term.
2. Forgetting that CPU is also called Central Processing Unit and is responsible for performing calculations and running programs.
3. Using the opinion adjective order incorrectly: general opinion usually comes before specific opinion, and opinion adjectives come before descriptive ones.
4. Placing the power supply / motherboard wrongly in the case description: power supply is located at the bottom, and motherboard’s role is connecting components (case houses components).
5. Confusing prepositions of place vs movement: place = position (in/on/under/behind), movement = trajectory (into/out of/past/around).
6. Dangerously assuming magnets are harmless to HDD data: a powerful magnet near a hard drive can damage stored data by interfering with magnetization.
7. Misusing articles (a/an/the/Ø): “Ø” is for general notions with plural/uncountables, while “the” is for a well-defined existing element.

✅ Exam Checklist

1. Identify the purpose of the computer case and the location of the power supply.
2. State the functions of the motherboard, CPU (Central Processing Unit), RAM, hard drive, and graphics card.
3. Describe a computer using the input-process-store-output cycle (and the “accepts/ processes/ stores/ produces output” wording).
4. Write correct adjective order for 2–3 adjectives using: General opinion → Specific opinion → Size → Shape → Age → Color → Nationality → Material.
5. Tell the main differences among supercomputers, mainframes, minicomputers (midrange), and microcomputers (personal computers).
6. Use prepositions of place and prepositions of movement to produce correct location and movement sentences.
7. Explain the HDD magnetized vs demagnetized areas idea and what happens if a powerful magnet is near a hard drive.
8. Use correct imperative forms and sequencing words for instructions (e.g., First/Then/Finally, and Do not + V-to).
9. Classify software into system software (operating system) vs application software, and explain what “install” means.
10. Complete a network understanding: define a computer network and name LAN, PAN, MAN, WAN with their main ranges/uses from the text.
11. Choose correct determiners (a/an/the/Ø and some/any/no; plus Both/Either/Neither basics) to complete given sentences accurately.
12. Answer core internet concepts: what the Internet/Web are, what a web browser does, and name common cable-based connection types and internet service types.