Operating System

What Is an Operating System?

Short definition:
An operating system (OS) is the core software that runs a computer and manages hardware and applications.

What this actually means for a business:
It’s the platform everything runs on—Windows, macOS, or Linux—and keeps your devices functioning properly.

Common misconception:
Some believe updates aren’t necessary. Outdated operating systems are a major security risk.

When this matters:
If systems are slow, incompatible with newer software, or no longer supported.

Related terms: Software, Hardware