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Definition
3 min Is It Safe to Tell AI Chatbots Your Secrets?

AI chatbots are friendly, helpful, and always available. That makes it easy to overshare. Here's a simple rule for what's safe to tell ChatGPT, Claude, and the rest: treat it like a stranger on the street.

3 min
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3 min What Is Open Source?

Free software sounds like it must be flimsy. Some of the most important software on earth is free and open source, including the software running this website. Here's what it means.

3 min
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2 min Update vs. Upgrade: What’s the Difference?

Your phone wants to "update," a salesperson says you need to "upgrade." They sound the same, but one is routine maintenance and the other is a whole new ride. Here's the difference.

2 min
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3 min What Is a Backup? (And the 3-2-1 Rule)

A backup is a spare key for your files. But a spare key under the doormat isn't much of a spare. Here's what backups are, why attackers go after them, and the simple 3-2-1 rule.

3 min
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3 min Streaming vs. Downloading

Why does a streamed movie vanish when the Wi-Fi drops, but a downloaded one plays on the plane? It's the difference between renting a movie for the night and buying it.

3 min
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3 min Why Does AI “Hallucinate”?

You ask AI a question and it gives you a confident, detailed, completely made up answer. It isn't lying on purpose. Here's why it happens and what to do about it.

3 min
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2 min Virus vs. Worm vs. Trojan

People use these three words as if they mean the same thing. They are three different criminals with three different ways of getting through your door.

2 min
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2 min What Is an Algorithm?

The word sounds like a professor's homework. It is really just a recipe, and understanding it explains exactly why your social feed looks the way it does.

2 min
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