Antikythera mechanism
This is an old machine. It has many metal wheels. It tells us about the sun and moon. It helps us know the time. It is a great find! Can you see the wheels?
Early Reader · Change the reading level on the articleTechnology articles — Page 19
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 19 of 86
Anti-tank guided missile
Some missiles can hit tanks. They are very smart. They can fly to a target. They help people stay safe. It is a big job. Do you want to learn more?
Early Reader · Change the reading level on the articleAntonov An-225 Mriya
This was a very big plane. It could carry huge things. It even carried a space ship! The plane was lost in a war. People want to build a new one. Can you imagine a plane that big?
Early Reader · Change the reading level on the articleAnvil
An anvil is a heavy metal block. It helps people shape metal. A worker hits metal on the flat top. This makes the metal change shape. It is a very strong tool. Do you want to see metal being shaped?
Early Reader · Change the reading level on the articleAn Wang
An Wang was a smart man. He helped build computers. He made tools for writing. These tools helped many people. He was a great inventor. Do you like computers?
Early Reader · Change the reading level on the articleAOL
AOL was a way to use the web. It helped many people get online. It had games and chat rooms. This helped people talk to friends. It was a very big company. Do you like to play games online?
Early Reader · Change the reading level on the articleAPI
Computers talk to each other. They use special rules to work. These rules help them share things. It is like using building blocks. This helps us use new tools. Do you like computers?
Early Reader · Change the reading level on the articleApollodorus of Damascus
A man named Apollodorus built great things. He made big bridges and tall stone towers. He even helped make round roofs. His work helped people long ago. We can still see his ideas today. Do you like to build things?
Early Reader · Change the reading level on the articleApple II
The Apple II is a computer. It was made long ago. It can show colors on a screen. Many schools used them for work. It is a very special machine. Do you like computers?
Early Reader · Change the reading level on the articleApplication checkpointing
Computers can save their work. They make a copy of what they are doing. This helps if the power goes out. Then the computer does not start over. It can just pick up where it left off. It is like a magic pause button.…
Early Reader · Change the reading level on the articleApplication software
Apps help us do things. They live on phones and computers. You can use them to play games. You can use them to write. They help us every day. Do you have a favorite app?
Early Reader · Change the reading level on the articleApplication-specific integrated circuit
Some tiny chips do one job. They are made for one thing. One chip might help a voice recorder. They help our tools work well. Do you like gadgets? How many do you have?
Early Reader · Change the reading level on the articleApplied science
People use science to fix things. They use what they know to solve problems. This can help doctors or builders. It makes our world work well. It is very helpful to us. Do you want to help too?
Early Reader · Change the reading level on the articleAppropriate technology
Some tools are made to be simple. They do not cost much money. You can use them in your own town. They help people do work easily. They are good for our world. Do you like simple tools?
Early Reader · Change the reading level on the articleArab Mashreq International Road Network
Many roads connect many lands. These roads go through many places. They help people travel. They join many countries together. It is a big way to go. Do you like to go on trips?
Early Reader · Change the reading level on the articleArab States Broadcasting Union
Many groups work together. They share news and shows. They help with radio and TV. This helps people see and hear things. It makes news better for us. Do you like watching TV?
Early Reader · Change the reading level on the articleArc-fault circuit interrupter
A special switch keeps us safe. It watches the wires in your home. It stops sparks from starting fires. This helps keep your house safe. It is a smart tool. Do you have these in your home?
Early Reader · Change the reading level on the articleArchive file
An archive file is a big box. It holds many small files inside. It helps us save space. It also helps us send files fast. This keeps your work safe. It is very handy! Do you like to save things?
Early Reader · Change the reading level on the articleARD (broadcaster)
ARD is a group of TV stations. They show news and shows in Germany. Many people watch them on TV. They help us learn new things. It is a very big group. Do you like to watch TV?
Early Reader · Change the reading level on the articleArduino
You can build your own tools. These small boards help you make things. You can make a little robot. You can make a tool that senses motion. It is fun to create. What will you make?
Early Reader · Change the reading level on the articleArea (architecture)
An area is a space by a house. It is dug into the ground. It lets light into the bottom rooms. It also helps fresh air move. This keeps the house smelling good. Do you see spaces like this? It is a neat way to build.
Early Reader · Change the reading level on the articleArianespace
Arianespace helps send things to space. They use big rockets. These rockets carry small machines high up. They have done this for a long time. It helps us see the stars. Do you like space?
Early Reader · Change the reading level on the articleARINC 429
Big planes use wires to talk. These wires send notes. The notes tell the plane how to fly. They help the plane stay safe. It is like a secret code. Do you like planes?
Early Reader · Change the reading level on the articleArithmetic logic unit
A computer has a tiny brain part. It does math. It can add or take away. This helps the computer work. It is very fast. Do you like math?
Early Reader · Change the reading level on the articleArleigh Burke-class destroyer
These are big navy ships. They sail on the sea. They carry many tools. These tools help keep people safe. We can see them far away. Do you like big ships?
Early Reader · Change the reading level on the articleArmand Hammer
Armand Hammer was a man who did many things. He sold many things like pens and pencils. He also ran a very big oil company. He worked with people in many far places. He liked to collect art too. Do you like to…
Early Reader · Change the reading level on the articleARM architecture family
Small chips help computers work. They go in phones and tablets. These chips do not get too hot. This helps your tools stay cool. They are in many things you use. Do you have a phone?
Early Reader · Change the reading level on the articleArmor-piercing bullet
Some bullets are very strong. They have a hard core inside. This helps them go through metal. They move very fast. This is how they work. Do you see the hard part? It helps the bullet stay strong.
Early Reader · Change the reading level on the articleARPANET
A long time ago, computers could not talk. People built a new way to link them. This helped computers share things. It was the start of the internet. Now we can use it every day. Do you use the internet?
Early Reader · Change the reading level on the articleArquebus
A long gun is called an arquebus. It has a small hook. This hook helps hold the gun steady. It was used a long time ago. Soldiers used it in many lands. Can you find a hook on it?
Early Reader · Change the reading level on the articleArray (data structure)
A computer uses lists. These lists hold many things. Each thing has a spot. You can find things fast. This helps your computer work. It is very helpful. Can you find a list?
Early Reader · Change the reading level on the articleArrow
An arrow flies from a bow. It has a long, straight stick. A sharp tip is on the front. Small fins are at the back. This helps it fly straight. Do you want to try it?
Early Reader · Change the reading level on the articleArrowhead
An arrowhead is a sharp tip. It goes on the end of an arrow. Long ago, people made them from stone. They also used bone. These help an arrow hit a target. Do you like to see old things? Can you find a sharp stone?
Early Reader · Change the reading level on the articleArticulated bus
Some buses are very long. They have a middle part that bends. This helps them turn corners. They can carry many people. This helps us all travel. Do you like big buses?
Early Reader · Change the reading level on the articleArtificial general intelligence
Some people want to make smart machines. These machines could think like you. They might learn to do many new things. They could help us solve big problems. This is a big goal for many. Do you think a machine could…
Early Reader · Change the reading level on the articleArtificial intelligence in video games
Games use computer brains. These brains help characters move. They can act like people. This makes games fun to play. It helps you play with others. Do you like playing games?
Early Reader · Change the reading level on the articleArtificial language
Computers can make their own ways to talk. They use new ways to share ideas. This helps us learn how we talk. It is like a game for robots. It is very neat to see. Do you like to play games?
Early Reader · Change the reading level on the articleArtificial leather
Some things look like leather. They are made of plastic. This material is used for shoes and bags. It helps us save money. It is easy to clean too. Do you see any plastic leather?
Early Reader · Change the reading level on the articleArtificial life
People study how life works. They use computers to make life. They also use robots. Some use tiny living things. This helps us learn about our world. It is very cool! Do you want to learn more?
Early Reader · Change the reading level on the articleArts journalism
People write about art. They write about songs and films. They also write about books. This helps us learn about art. You can read it in a book. You can see it online too. Do you like to look at art?
Early Reader · Change the reading level on the articleAsa Griggs Candler
Asa Candler was a man from Georgia. He bought a recipe for a sweet drink. This drink became very famous. He helped build many tall buildings. He also helped his city. Do you like sweet drinks?
Early Reader · Change the reading level on the articleASCII
Computers use a special code. It helps them read letters. It also helps them read numbers. This code lets machines talk to us. It makes our work easy. Do you like to type on a keyboard?
Early Reader · Change the reading level on the articleAsian Highway Network
Many roads join together. They make a big path. This path goes across Asia. It helps people trade things. It can even reach Europe. It is a very long trip! Can you imagine driving that far?
Early Reader · Change the reading level on the articleASML
A big company makes tiny parts. These parts go in your tools. They help computers work fast. They use light to make them. It is very hard work. Can you find a computer?
Early Reader · Change the reading level on the articleAsphalt concrete
Roads are often black and smooth. This is made of tiny rocks. A sticky black stuff holds them together. It helps cars drive on flat paths. It is used for big roads. Do you see black roads?
Early Reader · Change the reading level on the articleAssault rifle
This is a special kind of gun. It is used by many armies. It can fire many shots fast. It is a very strong tool. It helps soldiers do their jobs. Do you see one in a book?
Early Reader · Change the reading level on the articleAssociated Press
The AP tells news. It sends news to many places. People read it on paper. They hear it on the radio. It helps us know what is happening. Do you like to hear the news?
Early Reader · Change the reading level on the articleAssociation for Computing Machinery
Many people work with computers. They belong to a big group. This group helps them learn. It started a long time ago. They share new ideas. It helps us use tools better. Do you like computers?
Early Reader · Change the reading level on the article