Brass rod with chain and Babbage’s Analytical Engine: what they have in common

1. Step 1. Brass rod with chain — is part of — Leyden jar. A lead to the inner plate.
2. Step 2. Leyden jar — evolved into — Capacitor. The Leyden jar was the first capacitor.
3. Step 3. Capacitor — is part of — RAM. A DRAM bit is stored in a tiny capacitor.
4. Step 4. RAM — is part of — Computer. RAM.
5. Step 5. Computer — includes — Harvard Mark I. One of the first programmable computers.
6. Step 6. Harvard Mark I — was inspired by — Babbage’s Analytical Engine. Howard Aiken named Babbage’s work as the source of his idea.

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