Tech Abbreviations We Use Every Day (But Rarely Think About)

As developers, we casually use words like:

CPU
RAM
HTTP
DNS
API
OS

They’ve become part of our daily vocabulary.

But at some point, each of these terms was confusing.

Understanding these fundamentals changes how you see systems working behind the scenes.

HTTP is not just a word — it defines how browsers and servers communicate.
DNS is not just a shortcut — it powers how the internet finds websites.
CPU is not just hardware — it’s the brain executing your code.

Sometimes improving as a developer doesn’t mean learning something new.
It means understanding the basics more deeply.

Which tech abbreviation confused you the most when you started?