Essential Computer Terms: RAM, CPU, GPU, SSD, HDD

Tap a term to see what it means.

RAM (Random Access Memory)

Temporarily stores data for programs currently running on your computer — more RAM means smoothly running more programs at once.

CPU (Central Processing Unit)

The "brain" of the computer, the core component that handles all calculations and instructions.

GPU (Graphics Processing Unit)

A dedicated processor for graphics calculations, widely used in gaming, video editing, and increasingly in AI computation.

SSD (Solid State Drive)

A semiconductor-based storage drive with no moving parts, reading and writing data far faster than a traditional hard drive.

HDD (Hard Disk Drive)

A traditional storage drive that spins a magnetic disk to store data — slower than an SSD but offers large capacity at a lower cost.

USB (Universal Serial Bus)

A universal standard for connecting computers to peripheral devices, supporting both data transfer and power delivery.

OS (Operating System)

The core system software that manages hardware and software and lets users operate the computer.

URL (Uniform Resource Locator)

The addressing system used to specify the location of a webpage or file on the internet.

IP (Internet Protocol)

A unique address assigned to identify each device connected to the internet.

Wi-Fi (Wireless Fidelity)

A short-range wireless technology that lets devices connect to the internet without a cable.

Terms Worth Knowing Before Buying a New Computer

Understanding terms like RAM, CPU, and SSD on a spec sheet helps you pick a computer that actually fits your needs. RAM and storage (SSD/HDD) are especially easy to confuse: RAM is temporary working memory, while storage keeps your data even after the power is turned off.

Frequently Asked Questions

Why are RAM and storage (SSD) different?

RAM only holds data temporarily while the computer is on and running a program, while an SSD or HDD keeps files intact permanently even after the power is off.

Why does GPU matter for gaming?

3D graphics calculations are handled far more efficiently by a GPU than a CPU, so the more graphically demanding a game is, the more its frame rate depends on GPU performance.