What Do Computers Do?

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In this lesson, May-Li Khoe explains the fundamental functions of computers, which include taking input, storing information, processing it, and outputting results. She highlights how various devices, from keyboards to smartwatches, provide input to computers, which then use algorithms to process the data and produce outputs like text, images, or signals. Ultimately, these four tasks are essential to the operation of all computers, showcasing their ability to handle and share information effectively.

What Do Computers Do?

Hi there! I’m May-Li Khoe, and I’m a designer and inventor. I’ve worked on some cool projects at Apple, and now I create fun products to help kids learn better in school. I also love DJing and dancing in my free time!

How Computers Work

When people first started thinking about how to make machines that could “think,” they figured out that these machines, which we call computers, needed to do four main things: take input, store information, process it, and then output the results. These four tasks are what make a computer a computer!

Input: Giving Information to Computers

Let’s start with input, which is my favorite part! Input is all the information that you or the world give to a computer to help it do its job. You can use a keyboard, mouse, microphone, or camera to tell a computer what to do. If you have a smartwatch, it might listen to your heartbeat. In a car, a computer might check how the car is running. Even when you touch a screen, that’s input! All these inputs give the computer information, which it stores in its memory.

Processing: Making Sense of Information

Next, the computer’s processor gets to work. It takes the information from memory and uses an algorithm, which is like a set of instructions, to change or analyze the information. Once it’s done, it sends the new information back to memory. This happens over and over until the information is ready to be used.

Output: Sharing the Results

Finally, the computer outputs the information. This could be anything from showing text, photos, or videos on a screen to playing interactive games or even creating virtual reality experiences. Sometimes, the output is a signal that controls a robot! When computers are connected to the Internet, the output from one computer can become the input for another, creating a big network of shared information.

The Four Functions of All Computers

No matter what kind of computer it is or what technology it uses, every computer does these four things: it takes in information, stores it as data, processes it, and then outputs the results. Isn’t that amazing?

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  1. How does the concept of input, as described in the article, relate to your everyday interactions with technology?
  2. Reflect on a time when you used a computer to process information. What was the task, and how did the computer’s processing capabilities assist you?
  3. Consider the various forms of output mentioned in the article. Which type of output do you find most fascinating, and why?
  4. How has understanding the four main functions of computers changed your perspective on how you use technology in your daily life?
  5. What are some examples of input devices you use regularly, and how do they enhance your interaction with computers?
  6. Think about the role of algorithms in processing information. Can you think of a situation where an algorithm significantly impacted your experience with technology?
  7. Discuss how the interconnectedness of computers via the Internet influences your personal or professional life.
  8. Reflect on the statement that every computer, regardless of its type, performs the same four functions. How does this universality affect your understanding of different technological devices?
  1. Activity: Input Scavenger Hunt

    Explore your surroundings and make a list of all the devices you can find that provide input to a computer. Think about keyboards, mice, cameras, and even sensors like those in smartwatches. Share your findings with the class and discuss how each device helps a computer gather information.

  2. Activity: Algorithm Adventure

    Create your own simple algorithm! Write down a set of instructions for a classmate to follow, like making a sandwich or drawing a picture. This will help you understand how computers process information using algorithms. Swap algorithms with a partner and try to follow each other’s instructions exactly.

  3. Activity: Memory Match Game

    Play a memory match game where you match pairs of cards that represent different types of data storage, like hard drives, USB sticks, and cloud storage. This will help you learn about how computers store information. Discuss why different types of storage might be used for different purposes.

  4. Activity: Output Showcase

    Create a project that demonstrates different types of computer output. You could make a poster, a slideshow, or even a short video. Include examples like text on a screen, sound from speakers, or signals to a robot. Present your project to the class and explain how each output is used in real life.

  5. Activity: Computer Function Relay

    Participate in a relay race where each team member represents one of the four main functions of a computer: input, storage, processing, and output. As a team, you’ll pass a “data baton” through each function, demonstrating how information flows through a computer. Reflect on how each step is crucial to the computer’s operation.

Sure! Here’s a sanitized version of the transcript:

My name is May-Li Khoe, and I’m a designer and inventor. Some of the things I’ve designed have been at Apple, and now I create products for kids to help them have an easier time in school. My other jobs include DJing and dancing.

As pioneers of computer science explored how to design a thinking machine, they realized it needed to perform four different tasks: take input, store information, process it, and then output the results. This might sound simple, but these four functions are common to all computers, which is what defines a computer.

First, let’s talk about input. This is my favorite part because input is the information that the world provides or that you give to the computer to make it perform tasks. You can tell a computer what to do using a keyboard, a mouse, a microphone, or a camera. If you’re wearing a computer on your wrist, it might listen to your heartbeat, or in your car, it might monitor the vehicle’s performance. A touchscreen can sense your finger, which is also considered input. All these different inputs provide information to the computer, which is then stored in memory.

A computer’s processor takes information from memory, manipulates it using an algorithm (a series of commands), and then sends the processed information back to be stored in memory again. This process continues until the information is ready to be output.

How a computer outputs information depends on its design. A computer display can show text, photos, videos, interactive games, or even virtual reality. The output may also include signals to control a robot. When computers connect over the Internet, the output from one computer can become the input for another, and vice versa.

Across all computers, regardless of the technology they use, they all perform the same four functions: they take in information, store it as data, process it, and then output the results.

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ComputersElectronic devices that can store, retrieve, and process data to perform various tasks. – Example sentence: Computers help us do our homework faster by searching for information online.

InputData or instructions that are entered into a computer system for processing. – Example sentence: Typing on a keyboard is a way to give input to a computer.

OutputThe information produced by a computer after processing input data. – Example sentence: The printer provides output by printing the document you created on the computer.

ProcessingThe action of a computer using its hardware and software to perform tasks on input data. – Example sentence: Processing happens when the computer calculates your math problems and shows the answers.

InformationData that has been organized or processed to be useful and meaningful. – Example sentence: After searching the web, the computer displayed information about the solar system.

MemoryThe part of a computer that stores data and instructions for quick access by the processor. – Example sentence: The computer’s memory helps it remember what you were working on when you open your project again.

AlgorithmA set of step-by-step instructions for solving a problem or completing a task. – Example sentence: The computer uses an algorithm to sort your pictures by date.

DataRaw facts and figures that can be processed by a computer to produce information. – Example sentence: The survey data was entered into the computer to find out which ice cream flavor is the most popular.

NetworkA group of interconnected computers that can share resources and information. – Example sentence: Our school has a network that allows all the computers to access the same printer.

TechnologyThe use of scientific knowledge and tools to solve problems and improve lives. – Example sentence: Technology helps us communicate with friends and family through video calls on our computers.

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