📚 Year 10 CCEA Computer Science: Key Terms Memory Guide | Year 10 CCEA 计算机：词汇术语速记指南
Mastering the technical vocabulary is a vital first step to success in CCEA GCSE Computer Science. This guide covers the most essential terms you will encounter in Year 10, with bilingual explanations and clever memory tricks to help you recall them quickly during tests and practical work.
掌握技术词汇是CCEA GCSE计算机科学成功的关键第一步。本指南涵盖你在Year 10会遇到的最基本的术语，并配有双语解释和巧妙的记忆技巧，帮助你在考试和实践中快速回忆。
1. Core Hardware Components | 核心硬件组件
CPU (Central Processing Unit): The main chip that fetches, decodes and executes instructions. Think of it as the computer's brain – 'Central' means it controls all operations.
CPU（中央处理器）：执行取指、解码和执行指令的主芯片。把它看作计算机的大脑——"Central"意味着它控制一切操作。
Motherboard: The large printed circuit board that connects the CPU, RAM, storage and other components. Remember: the 'mother' board holds all the 'child' parts together.
主板：连接CPU、内存、存储器等部件的大型印刷电路板。记忆："Mother"板把所有"子"部件连接在一起。
PSU (Power Supply Unit): Converts mains AC electricity into low-voltage DC power for internal components. Mnemonic: Power Supply Unit – it supplies the juice!
PSU（电源供应单元）：将市电交流电转换为内部组件使用的低压直流电。速记：Power Supply Unit — 提供电力的单元！
Heat Sink: A metal block with fins that draws heat away from the CPU. Usually paired with a fan. Think of a 'sink' that drains heat.
散热片：带有鳍片的金属块，用于将CPU的热量导走。通常配有风扇。想象成一个"排水槽"排走热量。
2. Primary Memory | 主内存
RAM (Random Access Memory): Volatile memory that stores currently running programs and data. Any location can be accessed directly ('Random'), but everything is lost when power is turned off – like a whiteboard wiped clean.
RAM（随机存取存储器）：易失性存储器，存放当前运行的程序和数据。任何位置均可直接访问（"Random"），但断电后所有内容都会丢失——像被擦净的白板。
ROM (Read-Only Memory): Non-volatile memory that holds firmware such as the BIOS. 'Read Only' means it cannot be changed easily, and it retains data without power.
ROM（只读存储器）：非易失性存储器，存放BIOS等固件。"Read Only"意味着不能轻易更改，且断电后仍能保存数据。
Cache: A small, very fast memory located near the CPU that stores frequently used instructions and data. Mnemonic: a 'cash' box kept close for quick access.
高速缓存：位于CPU附近的一个小而极快的内存，存储常用指令和数据。记忆：像一个放在身边的“现金”盒子，便于快速取用。
Virtual Memory: A portion of the hard drive used as if it were RAM when the actual RAM is full. It is much slower; think of borrowing a neighbour's desk when yours overflows.
虚拟内存：当实际RAM已满时，将部分硬盘空间当作RAM使用。速度要慢得多；想象成当你的桌子满了借用邻居的桌子。
3. Secondary Storage | 辅助存储
HDD (Hard Disk Drive): Magnetic storage with spinning platters and a read/write arm. High capacity but slower and more fragile. Remember the spinning 'hard' disks.
HDD（机械硬盘）：带有旋转盘片和读写臂的磁性存储设备。容量大，但较慢且易损坏。记住旋转的"硬"盘。
ed storage with no moving parts. Faster and more durable than HDD. Solid = no moving bits.
SSD（固态硬盘）：基于闪存的存储，没有移动部件。比HDD更快、更耐用。Solid = 无运动部件。
Optical Disc (CD/DVD/Blu-ray): Uses a laser to read and write data on reflective surfaces. Think of a disc that is 'optical' – light is used.
光盘（CD/DVD/蓝光）：使用激光在反射面上读写数据。记住“光学”介质——用光读取。
USB Flash Drive: Portable solid-state storage that plugs into a USB port. Often called a pen drive – as handy as a pen.
USB闪存盘：插入USB端口的便携式固态存储器。常被称为U盘——像笔一样方便。
4. Input Devices | 输入设备
Keyboard: The primary text input device. 'Key' + 'board' – a board full of keys. QWERTY layout helps you type efficiently.
键盘：主要的文本输入设备。"Key" + "board"——装满按键的板。QWERTY布局可助你高效打字。
Mouse: A pointing device that moves the cursor. The name comes from its shape; left and right clicks perform actions.
鼠标：用于移动光标的一个指点设备。名字源于其形状；左右键执行动作。
Touchscreen: A display that detects touch input. Combines both input and output. Used widely on phones and tablets.
触摸屏：能检测触摸输入的显示屏。兼具输入和输出功能。广泛用于手机和平板电脑。
Microphone: Captures sound and converts it into digital audio signals. Voice input is increasingly common.
麦克风：捕捉声音并将其转换为数字音频信号。语音输入日益普及。
Sensor: A device that measures physical conditions (light, temperature, motion) and sends data to the computer. Think of a 'sense' organ for the system.
传感器：测量物理条件（光线、温度、运动）并将数据发送至计算机的装置。想象成系统的"感觉"器官。
5. Output Devices | 输出设备
Monitor/Screen: Displays visual output from the computer. Measured in inches and resolution (pixels). LCD and LED are common types.
显示器/屏幕：显示计算机的可视化输出。以英寸和分辨率（像素）量度。LCD和LED是常见类型。
Printer: Produces hard copies of documents. Inkjet sprays ink; laser uses toner and a heated drum. A 'print' out is physical.
打印机：生成文档的硬拷贝。喷墨打印机喷射墨水；激光打印机使用碳粉和加热鼓。"Print"输出是实体。
Speakers: Output sound by converting electrical signals into vibrations. Used for music, alerts and system sounds.
扬声器：通过将电信号转换为振动来输出声音。用于音乐、提醒和系统声音。
Actuator: A device that causes physical movement based on computer signals, e.g. opening a valve or moving a robot arm. It 'actuates' motion.
执行器：根据计算机信号产生物理运动的设备，例如打开阀门或移动机器人手臂。它"执行"动作。
Projector: Casts a magnified image onto a large screen or wall. Often used in classrooms and presentations.
投影仪：将放大的图像投射到大屏幕或墙壁上。常用于教室和演示。
6. Software Categories | 软件分类
System Software: Programs that run the computer hardware and provide a platform. Includes the operating system and utilities. Think of it as the system's manager.
系统软件：运行计算机硬件并提供平台的程序。包括操作系统和实用工具。把它看作系统的管理者。
urces, user interface, file system and multitasking. Examples: Windows, macOS, Linux. OS = 'Orchestra' conductor.
操作系统 (OS)：管理资源、用户界面、文件系统和多任务处理的核心软件。例如Windows、macOS、Linux。OS可想象为乐队的指挥。
users to perform specific tasks, such as word processing, gaming or browsing. Apps = user's tools.
应用软件：允许用户执行特定任务的程序，如文字处理、游戏或浏览。Apps = 用户的工具。
Utility Software: System tools that maintain, optimise and secure the computer, e.g. antivirus, backup, disk defragmenter. 'Utility' means helpful.
实用工具软件：维护、优化和保障计算机的系统工具，如杀毒软件、备份软件、磁盘碎片整理。"Utility"意味着有用。
Driver: A small piece of software that allows the OS to communicate with a hardware device. Without a 'driver', the hardware can't function.
驱动程序：允许操作系统与硬件设备通信的小型软件。没有"司机"，硬件无法工作。
7. Data Units and Representation | 数据单位与表示
Bit: The smallest unit of data, either 0 or 1. Short for Binary digit. Everything in computing starts from bits.
比特：数据的最小单位，0或1。是"BInary digiT"的缩写。计算机中的一切从比特开始。
Nibble: A group of 4 bits. It is half a byte – like a small 'nibble' of information.
半字节：4个比特为一组。是半个字节——就像一小口信息。
Byte: A group of 8 bits. A single character like 'A' is often stored in one byte. One byte can represent 2⁸ = 256 values.
字节：8个比特构成一个字节。一个字符（如'A'）通常存储为一个字节。一个字节可以表示2⁸ = 256个值。
000 bytes (10³ bytes). In computing, memory sizes often use 1024 bytes = 1 kibibyte (KiB). 'Kilo' suggests a thousand.
千字节 (kB)：约1000字节（10³字节）。在计算中，内存大小常用1024字节=1千比字节(KiB)。"Kilo"表示一千。
⁶), 1 GB ≈ 1 billion bytes (10⁹). Note: internal memory often uses powers of 2 (MiB, GiB).
兆字节 (MB) 和千兆字节 (GB)：1 MB ≈ 100万字节 (10⁶)，1 GB ≈ 10亿字节 (10⁹)。注意：内存常使用2的幂次 (MiB, GiB)。
8. Number Systems | 数制
Denary (Decimal): Base-10 number system using digits 0–9. This is our everyday numbering. 'Deci' means ten.
十进制：基数为10的数字系统，使用数字0–9。这是我们日常所用的计数方式。"Deci"意为十。
ing only 0 and 1. Used by computers because transistors have two states (on/off). Remember 'bi' = two.
二进制：基数为2的数字系统，仅使用0和1。由于晶体管有两种状态（开/关），故计算机使用二进制。记"bi"代表二。
Hexadecimal (Hex): Base-16 system using digits 0–9 and letters A–F (A=10, F=15). Compact way to represent binary; one hex digit represents 4 bits.
十六进制：基数为16的系统，使用0–9及A–F（A=10, F=15）。是表示二进制的紧凑方式；一位十六进制数代表4个比特。
powers of 2). For 1101₂: (1 × 2³) + (1 × 2²) + (0 × 2¹) + (1 × 2⁰) = 8 + 4 + 0 + 1 = 13₁₀.
二进制转十进制：将每位乘以对应的位权（2的幂）。以1101₂为例：(1×2³)+(1×2²)+(0×2¹)+(1×2⁰)=8+4+0+1=13₁₀。
Denary to Binary: Repeatedly divide by 2 and record remainders. The remainders read backwards give the binary. Mnemonic: 'Divide by two, remainder tells you'.
十进制转二进制：连续除以2，记录余数。反向读取余数即得二进制。记忆："除2取余，反向排列"。
9. Networks and Topologies | 网络与拓扑
LAN (Local Area Network): A network covering a small geographical area, like a school or office. 'Local' means nearby.
LAN（局域网）：覆盖较小地理区域的网络，如学校或办公室。"Local"指附近。
WAN (Wide Area Network): A network that spans large distances, often connecting multiple LANs. The Internet is the largest WAN. 'Wide' covers the world.
WAN（广域网）：跨越长距离的网络，通常连接多个局域网。互联网是最大的广域网。"Wide"遍及世界。
Star Topology: All devices connect to a central switch or hub. Easy to troubleshoot; failure of one cable does not bring down the network. Looks like a star.
星型拓扑：所有设备连接到中央交换机或集线器。易于故障排除；一根线缆故障不会瘫痪整个网络。形状如星。
Bus Topology: All devices share a single communication line (backbone). Simple and cheap but a break stops the whole network. Picture a single 'bus' route.
总线型拓扑：所有设备共享一条通信线路（主干）。简单便宜，但一处断开会停止整个网络。想象成单条"公交"线路。
Ring Topology: Devices are connected in a closed loop; data travels in one direction. A single break disrupts the ring. Circular like a ring.
环型拓扑：设备连接成闭环；数据单向流动。单点故障会中断整个环。形如圆环。
10. Networking Hardware | 网络硬件
Router: A device that forwards data packets between networks, often connecting a LAN to the Internet. It 'routes' traffic using IP addresses.
路由器：在网络间转发数据包的设备，常用于将局域网连接到互联网。它基于IP地址对流量进行"路由"。
Switch: Connects devices within a LAN and sends data only to the intended recipient, unlike a hub. Smarter than a hub – switch intelligently.
交换机：在局域网内连接设备，并仅将数据发送到目标接收者，这与集线器不同。比集线器更智能——切换巧妙。
Modem (Modulator-Demodulator): Converts digital signals from a computer into analogue signals for transmission over telephone lines, and vice versa. 'MOdulate DEModulate'.
调制解调器：将计算机的数字信号转换为适合电话线传输的模拟信号，反之亦然。"MOdulate DEModulate"。
NIC (Network Interface Card): A hardware component that allows a computer to connect to a network. It can be wired (Ethernet) or wireless (Wi-Fi). NIC is the computer's network passport.
网络接口卡：允许计算机连接网络的硬件组件。可以是有线（
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