Image gallery: Building an Apple-1 replica from sc...
Early computers were designed for functionality, not aesthetics. The Apple-1 did not come with a case; hobbyists instead designed their own, including carving wooden cases or retrofitting briefcases.
The Replica 1 is similarly utilitarian, so there's a power LED right on the board to indicate the on/off state. Here I'm holding the LED, which has two leads that slide into the appropriate holes, in my left hand; the longer lead is the positive end and is inserted where the + symbol indicates.
Image gallery: Building an Apple-1 replica from scratch