Chatbots like ChatGPT, Gemini and Claude run on large language models. Here's what they are, how they work and why they sometimes get things confidently wrong.

Every USB-C cable looks the same, but they can differ hugely in charging power and data speed. Here's how to tell them apart and buy the right one.

How AI tools work, what they can and can’t do, and how to use them safely.

Router boxes are covered in Wi-Fi numbers and speed claims. Here's what Wi-Fi 6, 6E and 7 really change, and when an upgrade makes a difference at home.

When you click a link to a retailer such as Amazon, you go to their website, which may set its own cookies. Those cookies are controlled by the retailer and covered by its privacy and cookie policies.

Phones get lost and drives fail. The 3-2-1 rule is the simplest way to make sure your photos, documents and memories survive.… ...

More processing is moving from distant data centers onto your phone, car and home devices. Here's what "the edge" means and how it affects speed, privacy ...