What is a Computer?
A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data. Whether you are typing a document, sending an email, or browsing the web, you are using the computer's power to handle complex information instantly.
Watch the video below to learn about different types of computers and how they work.
Hardware vs. Software
Before we explore the different shapes computers take, let's look at the two things all computers have in common: Hardware and Software.
Hardware
Hardware is any part of your computer that has a physical structure. If you can touch it, it's hardware.
Software
Software is a set of instructions that tells the hardware what to do. You can't touch software, but you see its results on your screen.
Types of Computers
When most people hear the word "computer," they think of a desktop or laptop. However, computers come in many shapes and sizes.
1. Desktop Computers
Designed to stay in one place (usually on a desk), these are typically made of several parts including the computer case, monitor, keyboard, and mouse.
2. Laptop Computers
Battery-powered and portable, laptops allow you to take your workspace almost anywhere. They are "all-in-one" devices with a built-in screen and keyboard.
3. Tablet Computers
Handheld computers that are even more portable than laptops. They use a touch-sensitive screen for navigation instead of a physical keyboard.
4. Servers
A server is a computer that "serves up" information to other computers on a network. Whenever you use the Internet, you are accessing data stored on a server.
PCs and Macs
Personal computers generally come in two primary styles: PC and Mac.
- PCs: Usually run the Microsoft Windows operating system. They are the most common type of personal computer and come from many different manufacturers like Dell, HP, and Lenovo.
- Macs: All Macs are made by Apple and use the macOS operating system. They were the first computers to popularize the graphical user interface.
Frequently Asked Questions
What exactly does a computer do?
A computer takes raw data (input), processes it according to instructions, and provides a result (output). It can also store that information for later use.
Is a smartphone considered a computer?
Yes! Modern smartphones have a CPU, memory, and an operating system, making them powerful specialized computers that fit in your pocket.
Can software work without hardware?
No. Software needs a physical device (hardware) to exist on and to carry out its instructions.
What is the main difference between a PC and a Mac?
The main difference is the Operating System (Windows vs. macOS) and the hardware design. Macs are exclusive to Apple, while PCs are made by many different companies.
What is a "Wearable"?
Wearables are specialized computers designed to be worn on the body, such as smartwatches and fitness trackers.
