The Apple I (Apple 1) was the first Apple computer that originally sold for $666.66. The computer kit was developed by Steve Wozniak in 1976 and contained a 6502 8-bit processor and 4 kb of memory, which was expandable to 8 or 48 kb using expansion cards. Although the Apple I had a fully assembled circuit board, the kit still required a power supply, display, keyboard, and case to be operational. Below is a picture of an Apple I from an advertisement by Apple.
The first Apple I was built using a wood box as the case and is believed to have been hand-built by Steve Wozniak.