📚 Year 8 WJEC Computer Science: Vocabulary & Terminology Quick-Memorization Guide | WJEC 八年级计算机：词汇术语速记指南
Learning computer science is like learning a new language — you need to master the key words and phrases first. This guide will help Year 8 students following the WJEC curriculum to quickly remember essential computing terms through clever memory hooks, analogies, and simple tricks. Each term is broken down into easy-to-digest explanations paired with a memorization tip that actually works.
学习计算机科学就像学一门新语言——你得先掌握关键词汇。这份指南将帮助 WJEC 课程的八年级学生，通过巧妙的记忆钩子、类比和简单的技巧，快速记住核心计算机术语。每个术语都配有易于消化的解释和真正有效的记忆窍门。
1. What is an Algorithm? | 什么是算法？
An algorithm is a precise, step-by-step set of instructions designed to solve a problem or perform a task. Think of it as a cooking recipe: you must follow the steps in the correct order to get the expected dish. To remember the word, break it into “Al-go-rithm” — imagine a robot named Al who always has to “go” with a “rhythm”.
算法是一组精确的、逐步的指令，用于解决问题或执行任务。可以把它想象成一份烹饪食谱：你必须按照正确的顺序执行步骤，才能得到预期的菜肴。要记住这个词，可以把它拆成 “Al-go-rithm” —— 想象一个叫阿尔的机器人，他总得跟着“节奏”(rhythm) “走”(go)。
Algorithms can be expressed in natural language, flowcharts, or pseudocode. In Year 8, you will often write simple algorithms for everyday tasks, such as making a cup of tea or adding two numbers. Mnemonic: “A Logic Game Of Rhythm” = ALGORITHM.
算法可以用自然语言、流程图或伪代码来表达。八年级时，你经常会为日常任务编写简单算法，比如泡一杯茶或两数相加。助记口诀：“A Logic Game Of Rhythm” 首字母拼起来就是 ALGORITHM。
2. Variables and Data Types | 变量与数据类型
A variable is a named container in a program that holds a value which can change during execution — like a box with a label. To remember it, think of a “varying able” — something that is “able” to “vary”.
变量是程序中有名称的容器，用来存放一个在执行过程中可以改变的值——就像一个贴着标签的盒子。要记住它，想想 “varying able” ——有能力“变化”的东西。
Common data types in Year 8 include integer (whole number), float (decimal number), string (text), and Boolean (True/False). Memory trick: “I Fought Some Bullies” — Integer, Float, String, Boolean. Or simply visualise a string as a necklace of characters; a float as a boat that can have a decimal point; Boolean as a light switch with only two states.
八年级常见的数据类型包括整数（integer）、浮点数（float）、字符串（string）和布尔值（Boolean）。记忆技巧：“I Fought Some Bullies” 首字母对应 Integer, Float, String, Boolean。或者把字符串想象成一条字符项链；浮点数像一艘可以有小数的船（float 有浮动之意）；布尔值就像只有两种状态的灯开关。
3. Input, Process, Output (IPO) | 输入、处理、输出
The Input-Process-Output model is the foundation of how computers work. Input is data you give to the system (e.g., typing on a keyboard); Process is what the computer does with it (calculations, decisions); Output is the result you get (display on screen). To memorise, use the rhyme “In comes data, Pro makes it clever, Out shows the answer forever.”
输入-处理-输出模型是计算机工作的基础。输入是你给系统的数据（例如键盘打字）；处理是计算机对数据所做的运算和判断；输出是你得到的结果（屏幕显示）。记忆儿歌：“数据进来是 Input，中间处理 Pro 变聪明，最后答案 Output 亮晶晶。” 中文取首字母：输入（I）、处理（P）、输出（O）。
You can also visualise a sandwich maker: you put bread and cheese in (input), the machine heats and presses (process), and you get a toasted sandwich (output). The acronym IPO is the same as Initial Public Offering in business — think of it as your program’s “opening day”.
你也可以想象一个三明治机：你放入面包和奶酪（输入），机器加热压合（处理），你得到烤三明治（输出）。首字母缩写 IPO 在商业中正好是首次公开募股——不妨把它想成你程序的“开张日”。
4. Sequence, Selection, Iteration | 顺序、选择、迭代
These are the three building blocks of any algorithm. Sequence means executing instructions one after another in order. Selection means making a decision — if something is true, do this; otherwise, do that. Iteration means repeating a set of instructions, often called a loop. To lock them in memory, use the phrase “Sir, I Select Iteration” — SSI — but actually it’s Sequence, Selection, Iteration.
这三个是任何算法的基本构建块。顺序（Sequence）意味着按次序一条指令接一条指令地执行。选择（Selection）意味着做出判断——如果某条件为真，就做这个；否则做那个。迭代（Iteration）意味着重复一组指令，常被称为循环。记忆口诀：“顺序选择循环，编程三剑客”，英文用 “Super Silly Iguanas” 联想 Sequence, Selection, Iteration。
Think of a traffic light: Sequence is green, then yellow, then red in fixed order. Selection is checking “is it red?” — if yes, stop. Iteration is the light cycling through colours repeatedly. You can also remember that “selection” uses a question mark shape, like an IF statement branching into two paths.
想想交通信号灯：顺序就是绿灯、黄灯、红灯按固定顺序依次亮起。选择就是检查“是红灯吗？”——如果是，就停下。迭代就是信号灯不断重复颜色循环。你还可以记住“选择”就像一个问号形状，像 IF 语句分成两个分支。
5. Hardware: Input and Output Devices | 硬件：输入和输出设备
Hardware refers to the physical parts of a computer you can touch. Input devices send data into the computer — keyboard, mouse, touchscreen, microphone. Output devices show or present data from the computer — monitor, printer, speakers. A quick memory trick: “I comes before O in the alphabet, just like data must enter (Input) before it can exit (Output).”
硬件指的是你能触摸到的计算机物理部件。输入设备将数据送入计算机——键盘、鼠标、触摸屏、麦克风。输出设备展示或呈现来自计算机的数据——显示器、打印机、音箱。记忆窍门：字母表里 I 在 O 前面，就像数据必须先进入（Input）然后才能出去（Output）。
Some devices can be both input and output, like a touchscreen or a headset with a microphone. To recall these dual-role devices, think of a double-ended arrow: I/O. Visualise a security guard at a building entrance: the guard both receives information (who you are) and gives information (directions).
有些设备可以既是输入又是输出，比如触摸屏或带麦克风的耳机。要记住这些双角色设备，想象一个双向箭头：I/O。想象一栋大楼门口的保安：保安既接收信息（你是谁），也给出信息（指引方向）。
6. Storage: Primary vs Secondary | 存储：主存储器与辅助存储器
Primary storage (or main memory) is directly accessible by the CPU and is volatile — it loses its contents when power is off. RAM (Random Access Memory) is the most common example. Secondary storage keeps data permanently even without power, like a hard drive or SSD. Mnemonic: “Primary is Present, Secondary is Stored.”
主存储器（主存）由 CPU 直接访问，且是易失性的——断电后内容丢失。RAM（随机存取存储器）是最常见的例子。辅助存储器即使在断电时也能永久保存数据，例如硬盘或固态硬盘。助记：“主存临时记，辅存永久存。”
Think of RAM as your desk — you work on papers there but clear it at the end of the day. Your filing cabinet is secondary storage — things stay in it overnight. Also, the word “volatile” means “easily evaporated”, which helps you remember that data vanishes when power is off.
把 RAM 想象成你的书桌——你在上面处理文件，但一天结束时清理干净。你的文件柜就是辅助存储器——东西会在里面过夜。另外，“volatile”（易失）这个词本身有“易挥发”的意思，正好帮你记住断电后数据就蒸发了。
7. Software: System vs Application | 软件：系统软件与应用软件
Software is the collection of programs that tell the hardware what to do. System software includes the operating system (like Windows or macOS) that manages resources and provides a platform for other software. Application software performs specific tasks for users, such as word processors or games. Memory hook: “System software runs the System; Application software helps you Apply for things.”
软件是告诉硬件该做什么的所有程序的集合。系统软件包括操作系统（如 Windows 或 macOS），它管理资源并为其他软件提供平台。应用软件为用户执行特定任务，例如文字处理器或游戏。记忆钩子：“系统管机器，应用帮做事。”
You can compare the operating system to a school principal who keeps everything running smoothly in the background, while applications are like individual teachers running their own classrooms. Another trick: OS starts with “O” for “Organiser”; App starts with “A” for “Activity”.
你可以把操作系统比作学校的校长，他在后台确保一切正常运行；而各个应用就像独立的老师在自己的教室里开展活动。另一个技巧：OS 以 O 开头，代表 Organiser（组织者）；App 以 A 开头，代表 Activity（活动）。
8. Binary, Bits, Bytes | 二进制、比特、字节
Computers use binary, a base-2 number system with only two digits: 0 and 1. A single binary digit is called a bit (short for binary digit). A group of 8 bits is a byte. To remember, visualise “bi-” as two wheels on a bicycle, and “bit” as a tiny piece of information. For byte, think of “taking a byte out of eight bits”.
计算机使用二进制，一种只有两个数字 0 和 1 的基数为 2 的数字系统。一个二进制位称为比特（bit，binary digit 的缩写）。8 个比特组成一个字节（byte）。要记住，把“bi-”想象成自行车的两个轮子，“bit”是一小片信息。对于 byte，联想“从八个 bits 中咬一口 (bite/byte)”。
Binary values are often represented as place values: 128, 64, 32, 16, 8, 4, 2, 1 from left to right for an 8-bit number. You can remember the ascending pattern as “Double every time, starting from 1”. A simple 4-bit nibble (half a byte) is also a useful concept — imagine a small “nibble” of chocolate.
二进制值常常表示为从右至左的位权：1, 2, 4, 8, 16, 32, 64, 128（8位数字从左至右则是128,64,…,1）。记住这个递增规律：“每次都翻倍，从 1 开始”。半个字节（4位）叫 nibble，可以想象成一小口（nibble）巧克力。
9. Networks and the Internet | 网络与互联网
A network is two or more computers connected together to share resources. A LAN (Local Area Network) covers a small area like a school; a WAN (Wide Area Network) spans a large geographical area. The Internet is a global WAN connecting millions of networks. Memory clue: “LAN is Local (small), WAN is Wide (world)”.
网络是两台或多台计算机连接在一起以共享资源。LAN（局域网）覆盖像学校这样的小区域；WAN（广域网）跨越大地理范围。互联网是连接数百万个网络的全球性 WAN。记忆提示：“LAN 小如校园，WAN 广如世界”。
Key hardware: a router directs data packets between networks; a switch connects devices within a LAN. Think of a switch as a room connector and a router as a door to the outside. The Internet works on protocols like TCP/IP — imagine a postman who must follow rules (protocols) to deliver letters (packets).
关键硬件：路由器（router）在网络之间引导数据包；交换机（switch）在局域网内连接设备。把交换机想象成房间连接器，路由器是通往外面的大门。互联网依靠 TCP/IP 等协议工作——想象一位邮递员必须遵循规则（协议）才能投递信件（数据包）。
10. Cybersecurity: Threats and Safety | 网络安全：威胁与安全措施
Malware is malicious software designed to damage or disrupt systems. Types include virus (attaches to files, spreads), worm (self-replicates without host files), and trojan (disguised as legitimate software). Memory trick: “Virus needs a host, Worm wriggles alone, Trojan tricks you.”
恶意软件（malware）是设计用来破坏或中断系统的恶意软件。类型包括病毒（附着于文件、传播）、蠕虫（无需宿主文件自我复制）和特洛伊木马（伪装成合法软件）。记忆口诀：“病毒要宿主，蠕虫自己爬，木马骗你装”。
Phishing is a scam where attackers send fake emails or messages to trick people into revealing personal information. Think of “phony fishing” — they throw bait (an email) hoping you’ll bite. A firewall monitors and controls incoming and outgoing network traffic, like a security wall. Strong passwords combine uppercase, lowercase, numbers, and symbols; you can remember “3 out of 4 character types”.
网络钓鱼（phishing）是攻击者发送虚假电子邮件或消息以骗取个人信息的一种骗局。联想 “phony fishing”（假钓鱼）——他们抛出诱饵（邮件），希望你来咬钩。防火墙（firewall）监控并控制进出网络的流量，就像一道安全墙。强密码应包含大写字母、小写字母、数字和符号；你可以记住“4种字符类型中至少用3种”。
11. The CPU and its Components | 中央处理器及其组件
The CPU (Central Processing Unit) is the brain of the computer. It carries out instructions using the fetch-decode-execute cycle. Main components: Control Unit (CU) directs operations; Arithmetic Logic Unit (ALU) performs maths and logic; registers are tiny, super-fast storage locations inside the CPU. Remember: “C-U controls, ALU calculates, Registers hold.”
CPU（中央处理器）是计算机的大脑。它通过取指-译码-执行循环来执行指令。主要组件：控制单元（CU）指挥操作；算术逻辑单元（ALU）执行数学和逻辑运算；寄存器是 CPU 内部极小的超快存储位置。记住：“CU 管指挥，ALU 管计算，寄存器管暂存。”
Think of a chef: the Control Unit is the chef reading the recipe, the ALU is the chef chopping and mixing, and registers are the tiny bowls where ingredients are temporarily placed. The clock speed (measured in GHz) tells how fast the CPU works — “tick-tock” like a clock.
想象一位厨师：控制单元是读食谱的厨师，ALU 是切菜和搅拌的厨师，寄存器是暂时放置配料的小碗。时钟速度（以 GHz 计）表示 CPU 的工作速度——就像一个滴答滴答的时钟。
12. Memory Tricks: Acronyms & Analogies | 记忆技巧：首字母缩略词与类比
Use acronyms to group terms: “HIPO” for Hardware, Input, Process, Output. Or “BASIC” for a simple programming language that stands for Beginner’s All-purpose Symbolic Instruction Code — but here we can repurpose it: Binary, Algorithm, Sequence, Iteration, Condition. Create your own silly sentences where every word starts with the first letter of the term you need to remember.
用首字母缩略词把术语分组：例如“HIPO”代表硬件、输入、处理、输出。或者“BASIC”原本是一门简单编程语言（初学者通用符号指令代码），但我们可以改造成：Binary, Algorithm, Sequence, Iteration, Condition。创造你自己的滑稽句子，让每个单词的首字母对应要记的术语。
Analogies are powerful: compare a computer to a human body (CPU = brain, RAM = short-term memory, hard drive = long-term memory, input devices = senses, output devices = speech/actions). The motherboard is the skeleton connecting everything. This kind of mental mapping makes abstract ideas concrete and easy to recall under exam pressure.
类比法非常强大：把计算机比作人体（CPU = 大脑，RAM = 短期记忆，硬盘 = 长期记忆，输入设备 = 感官，输出设备 = 语言/动作）。主板是连接一切的骨架。这种脑内地图能让抽象的概念变得具体，在考试压力下也能轻松回忆。
Finally, practice by teaching a friend or a pet — explaining a term out loud cements it better than silent reading. Write colourful flashcards with the term on one side and a drawing or memory hook on the other. Keep reviewing and testing yourself; spaced repetition is scientifically proven to beat cramming.
最后，通过教朋友或宠物来练习——大声解释某个术语比默读记得更牢。制作彩色抽认卡，一面写术语，另一面画图或写记忆钩子。坚持复习和自我测试；间隔重复已被科学证明比临时抱佛脚更有效。
Published by TutorHao | Computer Science Revision Series | aleveler.com
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