Engine control unit and Babbage’s Analytical Engine: what they have in common

1. Step 1. Engine control unit — has part — Microprocessor. A microprocessor.
2. Step 2. Microprocessor — is part of — Programmable logic controller. A processor.
3. Step 3. Programmable logic controller — evolved from — Relay. It replaced relay cabinets.
4. Step 4. Relay — is part of — Harvard Mark I. The Mark I was electromechanical, built from relays.
5. Step 5. Harvard Mark I — was inspired by — Babbage’s Analytical Engine. Howard Aiken named Babbage’s work as the source of his idea.

Open Evothings