PCB

The Translation: PCB stands for “Printed Circuit Board.” It is the flat, green (or black) fiberglass board sitting inside the keyboard case that acts as the “brain.”

Use It In a Sentence: “I accidentally spilled coffee on my desk and fried the PCB, so the keyboard won’t turn on anymore.”

Why You Care: Every single switch plugs directly into the PCB. It detects your keystrokes and sends that information to your computer. When you are buying a custom keyboard kit, the PCB dictates the layout—it determines if you get a number pad, arrow keys, or RGB lighting.