Hardware

Cracking Open the IBM PC Jr.

Coils

From the opposite angle you can see a couple of wire coils, one of which is inside a metal shield.

About

Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to BreakingModern.com, aNewDomain.net, and TechRepublic.