system

A system of connected electronic parts that pass signals or power

A group of connected buildings used together

The moving parts inside a machine that make it run

A group of connected parts that work together to do a job

The parts that make up a machine or device

The act of taking a machine or system apart

Being separate from people, things, or contact, for example losing internet

A sudden change in life or work that feels unpleasant and hard to handle

The group that runs schools for children from kindergarten to high school

The Sun and the objects that move around it, like planets and moons

Part of the body that protects you from germs and disease

Software that controls a computer and lets other programs run

A country's courts, officials, and rules that decide and enforce laws

The people, groups, and laws that govern a country

A network of nerves that sends messages between the brain and body to control movement and feeling

A group of computers and software that work together to store and use data

A set of devices like cameras and sensors that warn about intruders

A set of ideas and values that shape how people think and act

Weapons and other equipment used to protect a country or area from attack

All the banks in a country that work together to manage money and payments

The courts and judges who use laws to make fair decisions about cases

A system that keeps a machine or process working as it should

A group of devices that warns you automatically about danger like fire or a break-in

The way a country organizes how it makes, shares, and uses goods and services

Rules a government uses to set and collect taxes from people and businesses

A set of electronic devices that records, makes louder, or plays sound

The brain and spinal cord that control the body and mind

A group of people who help and encourage you in hard times

A network of vehicles and routes that moves people or goods

A way to send and receive information between people or machines

A set of ideas about what is right and wrong that guides a person or group

A group of parts that supply and carry electricity in a building, car, or area

A set of parts that remove heat to keep a machine or building cool

Electric trains that run under a city and carry many people

A set of weapons and radar that find and stop enemy missiles before they hit

A group of devices that automatically steer a vehicle like a rocket or plane

A way to put people or things into levels by how good they are

A network of machines and wires that make and send electricity to homes and businesses

The parts of the body that break down food and take in nutrients

A system of underground pipes that carries dirty water from homes and streets

The way a country supplies and manages money and how people measure its value

A group of parts that push a vehicle forward, like an engine

A group of fans and ducts that brings fresh air into a building and removes stale air

A group of cameras and devices that watch people or places for safety

Equipment that keeps a person alive by doing the body's most important jobs

A way of putting papers or computer files in order so you can find them easily

A set of pipes and buildings that collect, clean, and send water to homes

A group of people with shared rules and roles for living together

Organs that make sex cells and let people or animals have babies

A system that sends voice over wires or the internet

A network of main roads that carry cars and trucks between cities and regions

A set of tools and rules that help people in a company collect, store, and share records

A group of weapons designed to work together for military use

A group of machines and tools used together by the military to attack or defend

A computer setup that makes and stores copies of files to get them back after loss

The central bank of the United States that controls money and checks banks

A system of measurement using meters, kilograms, and seconds

A system that warms a building by moving hot air or water

A set of pipes and small nozzles that automatically spray water to put out fires

A television service that sends channels to homes through wires

A set of rules for how votes are cast and counted to choose leaders

A system in courts where ordinary people decide if someone is guilty in a trial

A social order where people stay in the group they are born into for life

Parts of the body that take in oxygen and remove carbon dioxide when you breathe

A set of loud electronic speakers that plays announcements in public places

A set of electronic equipment that plays recorded music through two speakers

A system that detects threats early, like missiles or storms, and sends alerts so people can act

Affecting every part of a system, not just one part

Organs and blood vessels, including the heart, that move blood and a clear fluid called lymph around the body

A system of laws that gives inventors the only right to make, use, or sell an invention for a time

A way of putting two people together so they help and keep each other safe

A set of rules for choosing leaders or deciding public issues

A system where people trust each other to be honest without being watched

A computer or online system that collects and counts votes

A system that uses satellites to find the exact position of a device on Earth

All the parts under the ground of a plant that hold it in soil and take water

A person who manages and keeps a computer network working in a company or school

A way to record and track a business's money and payments

A way of arranging and storing paper documents or computer data so you can find them

A part of a car or plane that stores and gives fuel to the engine

A group of brain parts that control feelings, behaviour, and memory