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

1. Step 1. Barometer — is part of — Weather station. A barometer.
2. Step 2. Weather station — is used in — Weather forecast. Observations.
3. Step 3. Weather forecast — uses — Electrical telegraph. Collecting reports by telegraph.
4. Step 4. Electrical telegraph — has part — Relay. Relays boosted the signal on long lines.
5. Step 5. Relay — is part of — Harvard Mark I. The Mark I was electromechanical, built from relays.
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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