A different kind of computer than we think of today, the Dynabyte is an S-100 bus system.
It is comprised of a case, power supply, and a passive motherboard with nothing but slots to insert cards.
But it's very sturdy - this particular system weighs 65 pounds!
All of the computer components, CPU, memory, interface circuitry, etc are on circuit boards
which plug into the motherboard.
Available S-100 cards include:
cassette tape interface
floppy disk controllers
This particular system is packed, almost every option has been installed, including an internal hard drive -
quite rare and expensive for the day.
Built in late 1981, after such capable and popular systems as the TRS-80 model III,
Commodore PET 4032, and the Osborne 1 portable computer,
it seems pretty antiquated by comparison.