Reference
Plain-English Tech Glossary
No jargon. No technical gobbledygook. Just clear, simple definitions of the tech terms you encounter every day.
- The Cloud
- A network of remote servers that store your data on the internet instead of on your device. When you back up photos to iCloud or Google Photos, you're saving them to "the cloud." Think of it as a safety deposit box for your digital files — you can access them from any device with an internet connection.
- Wi-Fi
- A way for devices to connect to the internet without cables. Your router broadcasts a wireless signal that your phone, laptop, tablet, and smart TV pick up. Wi-Fi 6 is the latest version — it's faster and handles more devices at once.
- VPN (Virtual Private Network)
- A service that creates a secure, encrypted tunnel between your device and the internet. It hides your online activity from your internet provider and protects your data on public Wi-Fi (like at a coffee shop or airport). Think of it as sending your internet traffic through a private, locked tube instead of an open pipe.
- Two-Factor Authentication (2FA)
- An extra security step beyond your password. After entering your password, you verify your identity a second way — usually by entering a code sent to your phone or generated by an app. It's like needing both a key and a fingerprint to open a door. Turn this on for email, banking, and social media accounts.
- Passkey
- A newer, more secure alternative to passwords. Instead of typing a password, you use your fingerprint, face, or device PIN to sign in. Passkeys can't be stolen in data breaches because they're stored on your device, not on a company's server. Major sites like Google, Amazon, and Apple now support them.
- Phishing
- A scam where criminals send emails, texts, or phone calls pretending to be a trusted company or person to trick you into sharing passwords, credit card numbers, or other personal information. The name comes from 'fishing' — they cast a line and hope you bite.
- Malware
- Short for 'malicious software.' Any program designed to harm your device or steal your data. Includes viruses, spyware, and ransomware. You usually get malware by clicking a bad link or downloading a fake app. Keeping your devices and apps updated is the best defense.
- Router
- The device that connects your home to the internet and shares that connection with your computers, phones, and smart devices. It's the box your internet provider installs or the one you bought yourself. Modern routers also create your home Wi-Fi network.
- Bandwidth
- The amount of data that can flow through your internet connection at once. Think of it like a pipe: higher bandwidth means a wider pipe that can carry more water (data) at the same time. Streaming video, video calls, and multiple devices all need bandwidth.
- Encryption
- A method of scrambling data so only the intended recipient can read it. When you see a padlock icon in your browser's address bar, the website is using encryption. Your messages on WhatsApp and iMessage are encrypted too — meaning no one but you and the recipient can read them, not even WhatsApp or Apple.
- Smart Device
- Any everyday item that connects to the internet and can be controlled remotely — smart lights, thermostats, doorbells, plugs, speakers, locks, and even refrigerators. Most smart devices are controlled through an app on your phone or by voice using Alexa, Google Assistant, or Siri.
- Firmware
- The permanent software built into a device that tells it how to operate. Your router, smart TV, and smart home devices all run on firmware. Updating firmware (usually through the device's app or settings menu) fixes bugs and patches security holes.
- Browser
- The program you use to visit websites — Chrome, Safari, Firefox, and Edge are the most common. Your browser is your window to the internet. Keeping it updated is important because updates fix security vulnerabilities.
- Spam
- Unwanted, unsolicited messages — usually email but also texts and phone calls. Most spam is advertising, but some contains scams or malware. Email providers filter most spam automatically. If something lands in your inbox that looks suspicious, mark it as spam rather than just deleting it.
- Mesh Network
- A home Wi-Fi system that uses multiple small units placed around your house instead of a single router. Each unit talks to the others to create a seamless blanket of coverage. Ideal for larger homes or houses with thick walls where a single router leaves dead spots.
- Operating System (OS)
- The core software that runs your device — Windows on most PCs, macOS on Apple computers, iOS on iPhones, Android on many phones and tablets. The OS manages everything from your screen to your apps. OS updates (like 'iOS 18' or 'Windows 11') add features and fix security issues.
- Bluetooth
- A short-range wireless connection between devices — like between your phone and wireless earbuds, or your computer and a wireless mouse. It uses very little power and works within about 30 feet. Not the same as Wi-Fi; Bluetooth connects devices to each other, while Wi-Fi connects devices to the internet.