Tech words get thrown around like everyone already knows them — cloud, API, algorithm, bandwidth, the lot. This plain-English tech glossary explains the terms you keep seeing, without the jargon and without assuming you have a computer-science degree. Bookmark it and come back whenever a word trips you up.
Each term gets a one-line definition and a quick real-world example, so it actually sticks.
Everyday internet and device terms
- Browser: the app you use to visit websites (Chrome, Safari, Firefox). Think of it as your window to the web.
- Cache: temporary storage that makes things load faster the second time. Clearing it forces a fresh copy.
- Cookies: small files a website saves on your device to remember you (like staying logged in).
- Bandwidth: how much data your connection can carry at once. More bandwidth, faster everything.
- Bug: a mistake in software that makes it behave wrong. A ‘patch’ fixes it.
Cloud, storage, and accounts
- The cloud: just someone else’s computers you use over the internet. Your photos ‘in the cloud’ live on a company’s servers, not your phone.
- Server: a powerful always-on computer that delivers websites, apps, or files to others.
- Storage vs RAM: storage is your long-term filing cabinet (photos, apps); RAM is your short-term desk space for whatever you’re using right now.
- Sync: keeping the same files up to date across your devices automatically.
Security terms worth knowing
- Two-factor authentication (2FA): a second check beyond your password (usually a code), so a stolen password isn’t enough to get in. Turn it on everywhere that matters.
- Encryption: scrambling data so only the right person can read it. ‘End-to-end’ means even the company can’t read it.
- Phishing: fake messages that trick you into giving up passwords or money. When in doubt, don’t click — go to the site directly.
- VPN: a private tunnel for your internet traffic, often used for privacy or to access content as if you’re elsewhere.
- Malware: any malicious software — viruses, ransomware, spyware. Keep software updated to stay protected.
AI and data terms (the 2026 buzzwords)
- Algorithm: a set of step-by-step rules a computer follows. Your social feed is ordered by one.
- AI (artificial intelligence): software that performs tasks that usually need human smarts, like recognising images or writing text.
- Machine learning: a kind of AI that improves by learning from examples instead of being explicitly programmed.
- LLM (large language model): the type of AI behind chatbots; it predicts text to answer questions and write content.
- Open source: software whose code is public and free to use or modify.
Connection and performance terms
- API: a way for two apps to talk to each other. When an app shows live weather, it’s using a weather API.
- Latency: the delay before data starts moving. Low latency feels instant; high latency feels laggy.
- Download vs upload: download is data coming to you; upload is data going out (like posting a video).
- HTTP/HTTPS: the rules for loading web pages. The ‘S’ means the connection is secure — look for it before entering passwords.
How to keep learning tech without overwhelm
You don’t need to memorise all of this. When a new term shows up, look up a plain-English definition and one example — exactly what this glossary does. Understanding compounds: each word you learn makes the next one easier.
FAQ
What’s the difference between the cloud and the internet?
The internet is the network that connects everything. ‘The cloud’ is using computing and storage that lives on other companies’ servers, reached over that internet.
Is it safe to store files in the cloud?
Generally yes, with reputable providers and 2FA enabled. The cloud also protects you if your device is lost or breaks — your files are still safe.
Do I really need 2FA?
Yes. It’s the single biggest upgrade to your online safety, and it takes minutes to set up on email, banking, and social accounts.
Keep this glossary handy
Tech vocabulary is just a language — learnable one word at a time. For more no-jargon explainers, visit our Tech section.