Command-line interface
You can talk to computers with words. You type a line of text. Then the computer does a job. This helps people do work fast. It is like magic! Do you like typing?
Early Reader · Change the reading level on the articleTechnology articles — Page 28
Explore inventions, engineering, computing and the tools people build to solve problems. Choose an article below; its reading controls let you move between the available levels.
4,107 public articles · Page 28 of 86
Commodore 64
The C64 is a home computer. It was made long ago. It can play games. It can make music, too. Many people bought one. Do you like computers?
Early Reader · Change the reading level on the articleCommon Gateway Interface
Web pages can do more than just show pictures. They can talk to you. When you click a button, a special program works. It helps the page change for you. It makes the web fun! Do you like to click buttons?
Early Reader · Change the reading level on the articleCommunication protocol
Machines use rules to talk. These rules help them share things. They must agree on the rules first. This helps them work well together. It is like how we talk. Do you like to talk to friends?
Early Reader · Change the reading level on the articleCommunity paper
Local papers tell news to your town. They come out every week or month. Many are free for you to take. They help us learn about our neighbors. They are fun to read! Do you like reading the news?
Early Reader · Change the reading level on the articleCompactFlash
This is a memory card. It holds your pictures. It can go in a camera. It helps you save things. It is very small. Do you like taking photos?
Early Reader · Change the reading level on the articleCompass (drawing tool)
A compass helps you draw circles. It has two legs. One leg has a sharp point. The other leg holds a pencil. You can change how wide the legs are. This makes big or small circles. Do you want to draw a circle?
Early Reader · Change the reading level on the articleCompound bow
A compound bow is a special bow. It uses wheels to help. These wheels make it easier to hold. This helps you aim well. It is a fun tool for sport. Do you want to try it?
Early Reader · Change the reading level on the articleCompressed-air energy storage
We can save power in air. We squeeze air into big tanks. This air holds energy for later. It helps us use sun and wind power. It is a smart way to help. Do you like to save things?
Early Reader · Change the reading level on the articleCompressor
A compressor squeezes gas. It makes the gas very tight. This helps move gas through pipes. It can even help make things cold. We use them in many ways. Do you see one at work?
Early Reader · Change the reading level on the articleComptes rendus de l'Académie des Sciences
People write books about science. These books share new things they find. They help us learn about the world. You can read them online. They tell us how things work. Do you like to learn new things?
Early Reader · Change the reading level on the articleComputational fluid dynamics
Computers can study how air and water move. They use math to see the flow. This helps us build fast planes. It can even help us see the weather. It is a very smart tool. Do you like to see how things work?
Early Reader · Change the reading level on the articleComputational science
Computers help us learn about the world. We use them to solve hard problems. They can act like a test. This helps us see what might happen. It is a smart way to study. Do you like computers?
Early Reader · Change the reading level on the articleComputer-aided design
Computers help people draw things. People use them to make plans. They can draw flat shapes. They can also draw solid shapes. This helps make cars and big ships. It makes making new things fast. Do you like to draw?
Early Reader · Change the reading level on the articleComputer-aided engineering
Computers help people build things. They test new ideas on a screen. This helps make cars safe and strong. It saves time and money too. It is a smart way to work. Do you like using computers?
Early Reader · Change the reading level on the articleComputer animation
Computers make moving pictures. They show many small pictures very fast. This makes things look like they move. It is like magic on a screen. You can see it in movies. Do you like cartoons?
Early Reader · Change the reading level on the articleComputer cartography
Computers help us make maps. These maps show us roads. They show us where to go. They help us find our way. Maps on screens are very handy. Do you like using maps?
Early Reader · Change the reading level on the articleComputer chess
Computers can play chess. They can play on phones. They can play on big machines. You can play against them to learn. It is fun to try! Can you beat a computer?
Early Reader · Change the reading level on the articleComputer cluster
Many computers work as one. They join together to do big jobs. They can act like one giant machine. This helps them work very fast. It also helps if one breaks. It is like a team of friends. Can you imagine a giant…
Early Reader · Change the reading level on the articleComputer cooling
Computers get very hot. They need to stay cool. Fans blow air to help. This keeps the parts safe. It helps them work well. Do you use a computer?
Early Reader · Change the reading level on the articleComputer Go
Computers can play a game called Go. It is a hard game for them. For a long time, people were better. Now, computers can win. They learn to play very well. It is like magic! Can you play Go?
Early Reader · Change the reading level on the articleComputer graphics (computer science)
Computers can make pictures. They make art and games. These pictures look real or fun. You see them on screens. We use them every day. Do you like computer games?
Early Reader · Change the reading level on the articleComputer-mediated communication
You can talk using machines. You can use a phone or a computer. You can send a quick note. You can also see a friend on a screen. It helps us stay close. Do you like to chat online?
Early Reader · Change the reading level on the articleComputer memory
A computer has a memory. It helps the computer work. It keeps your games and tools ready. This helps you play and learn. It is very fast. Do you use a computer?
Early Reader · Change the reading level on the articleComputer multitasking
Your computer can do many things at once. It can play a song and show a picture. It switches between jobs very fast. This helps you get things done. It is like having many hands! Can you name two things you do on a…
Early Reader · Change the reading level on the articleComputer numerical control
A computer can run a machine. It tells the tool where to go. The tool can cut wood or metal. This helps us make many things. It is very fast and smart. Do you like making things?
Early Reader · Change the reading level on the articleComputer port (hardware)
A computer port is a small hole. You can plug things into it. It helps a mouse or keyboard work. This lets your computer do more. It is very handy. Do you see any ports on your computer?
Early Reader · Change the reading level on the articleComputer virus
A computer virus is a bad program. It hides in other programs. Then, it makes copies of itself. This can make a computer slow. It can even break things. We use special tools to stay safe. Do you use a computer?
Early Reader · Change the reading level on the articleComputer vision
Computers can see things too. They look at pictures. They can tell what is in a photo. This helps robots move around. It helps machines work. It is very cool! Can you see things with your eyes?
Early Reader · Change the reading level on the articleConcentrated solar power
Big mirrors catch the sun. They turn light into heat. This heat makes power for us. We can use it at night too. It is a smart way to use the sun. Do you like the sun?
Early Reader · Change the reading level on the articleConcorde
Concorde was a fast plane. It could fly very, very fast. It flew over the big ocean. It helped people travel in a short time. It was a special plane to see. Would you like to fly in it?
Early Reader · Change the reading level on the articleConcrete slab
A concrete slab is a flat floor. It can be on the ground. It can also hang in the air. We use it for many buildings. It helps keep us safe. Do you see floors like this?
Early Reader · Change the reading level on the articleConcurrent computing
Computers can do many jobs at once. They do not wait for one to finish. They work on many things together. This helps the computer stay fast. It is like a busy road. Can you think of many jobs at once?
Early Reader · Change the reading level on the articleCondé Nast
This company makes magazines. They share stories about food and travel. They also share news on phones. You might see their books in a shop. It is fun to read them. Do you like magazines?
Early Reader · Change the reading level on the articleCondé Nast (businessman)
Condé Nast made many magazines. He owned big books with pictures. These books were for many people. He wanted people to love them. Do you like to read magazines?
Early Reader · Change the reading level on the articleConfederation Bridge
A big bridge goes over the sea. It links two parts of Canada. Cars drive on the long road. It is very long. It stays strong in the ice. Can you see the blue water?
Early Reader · Change the reading level on the articleConference call
Many people can talk on one call. This is a special phone call. It lets friends talk at once. It helps people work together. It is very helpful. Do you like to talk on the phone?
Early Reader · Change the reading level on the articleConglomerate (company)
One big company can own many small ones. These small companies do different jobs. One might make food. Another might fly planes. This helps the big company stay strong. It is like a large team. Do you see big…
Early Reader · Change the reading level on the articleConnecting rod
A metal rod helps engines work. It joins two parts together. It moves parts up and down. This makes wheels spin fast. It helps cars go. Can you hear an engine?
Early Reader · Change the reading level on the articleConocoPhillips
This big company finds oil. They work in many lands. They find oil and gas. This helps make things we use. It is a very large group. Do you know where oil comes from?
Early Reader · Change the reading level on the articleConrad Hilton
Conrad Hilton built many hotels. He owned hotels in many places. His hotels help people travel. He even helped people in need. He was a kind man. Do you like to stay in hotels?
Early Reader · Change the reading level on the articleConstruction aggregate
We use small rocks to build. They can be sand or stone. These rocks make roads strong. They also help make concrete. We use them for many things. Can you see rocks on your street?
Early Reader · Change the reading level on the articleConstruction engineering
People build big things. They build roads and bridges. They also build tall buildings. These workers plan how to build them. This helps us stay safe. It is a big job! Do you like to build things?
Early Reader · Change the reading level on the articleContact fuze
Some tools go bang when they hit things. They have a part in the nose. This part hits a hard surface. Then it makes a loud pop. This helps clear a path. Do you think it is loud?
Early Reader · Change the reading level on the articleContact lens
These are small lenses for your eyes. They sit right on your eye. They help you see better. They can even change your eye color. Many people use them every day. Do you wear glasses?
Early Reader · Change the reading level on the articleContainer format
Some files hold many things. One file can hold sound and video. It works like a box for data. This helps your computer play movies. It is very helpful! Do you like watching movies?
Early Reader · Change the reading level on the articleContainer port
A port is a busy place. Big ships bring boxes here. Then, trucks or trains take them away. This helps move things to you. It is a big job! Can you see a big ship?
Early Reader · Change the reading level on the articleContainer ship
Big ships carry many things. They carry big metal boxes. These boxes hold toys and food. The boxes go on trucks and trains. This helps us get what we need. Do you see big ships?
Early Reader · Change the reading level on the article