The keyboard of the UNITRON 2200 has built in macros, Applesoft commands and DOS commands. Very handy when doing basic programming. The only drawback is that the macro-key is the same key that changes from uppercase to lowercase and is also used when performing a reset. This results in constantly changing to lowercase when not wanting to. There are also two keys to make your own macros for the numeric keys.
The drive controller and a Z80 CPU (for CP/M compatibility) are not optional but built in on the motherboard. When you boot the system, it says "DISK ON" instead of "APPLE ][".