What Your Blood Pressure Numbers Actually Mean
Two numbers, both meaningful, and a condition that produces no symptoms until it has done damage.
Tag: explainer
40 posts
Why the Sky Is Blue, and Why Sunsets Are Not
One phenomenon explains both, and the explanation most people half-remember is slightly wrong.
Compound Interest, and Why the Timing Matters More Than the Amount
The mechanism is simple. The consequence over decades is counterintuitive enough to be worth seeing.
How to Read a Payslip and Spot Errors
Most people check the final number and nothing else. Errors happen and go unnoticed for years.
Edge Computing Explained Without the Buzzwords
Processing data near where it is created instead of sending it to a distant data centre. The reasons are concrete.
How Search Engines Decide What to Show You
The mechanism in plain terms, and why the results have changed so much recently.
What Open Source Means and Why It Matters to You
Not just free software. The distinction affects what you can rely on and for how long.
Why All USB-C Cables Are Not the Same
The connector is universal. What runs through it is not, and the labelling is close to useless.
What a Firewall Actually Does
The word is used for several different things. Here is what each one is protecting and from what.
How AI Chatbots Actually Work, Explained Simply
No mysticism and no jargon. What a language model is doing when it answers you.