Learn how computers connect and communicate. This unit covers network types, devices, and the protocols used for addressing.

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In this unit, we'll dive deeper into the workings of computers, starting with understanding how computers represent data as 1s and 0s, then finding out how they process 1s and 0s with logic …

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of …

Adafruit founder Limor Fried and virtual reality designer Nat Brown show how simple logical circuits underlie everything your computer does.

Learn to manage databases with SQL. You'll define tables, query for data, and perform updates, deletions, and joins.

So it took us eight bits to represent a number that only takes two digits to represent in the decimal system. That's because each bit represents less information, just zero or one instead of zero …

Inventor and designer May-Li Khoe and virtual reality designer Nat Brown introduce the four features that all computers share.

To access a website is to make a connection to a designated computer (called a server) that holds an HTML file describing the site. Once the connection is established, the server sends a …