That Large black monolith in the rear right is the CPU, or microprocessor - those things that Intel makes. This one is a Pentium III 450, but several different speeds and configurations are available. In front of the CPU is 128 Megs of RAM, or memory. This is the temporary place stuff gets stored as you work on your machine. Temporary, as it goes away when you turn your computers' power off.
Hard drives are permanent.
We'll be happy to build American as possible for you, but it gets expensive fast. There are several grades of parts and we use the best ones we can find. Assembled and ready for peripherals. Plug in cards complete the installation. Flat grey IDE cables run to the hard drive and the DVD drive.