Why is internet speed measured in megabits instead of megabytes?

Your internet bill promises one number, your download bar shows another, and the mismatch comes down to two units that aren't ...
Lifehacker

The Difference Between Bits and Bytes, and Why It Matters

Ever sign up for internet that claimed 20 Mb per second, only to find that your files download at 2.5 MB per second? They aren't lying to you. Look closely and you'll see that those two figures use ...