Harvard Mark I and turbine: what they have in common

1. Step 1. Harvard Mark I — was inspired by — Babbage’s Analytical Engine. Howard Aiken named Babbage’s work as the source of his idea.
2. Step 2. Babbage’s Analytical Engine — has part — Gear. Gears performed the calculations.
3. Step 3. Gear — is part of — Electric drill. A reduction gear.
4. Step 4. Electric drill — works like — Dental drill. The same task — spinning a drill bit; the foot-powered dental drill appeared before the electric drill.
5. Step 5. Dental drill — has part — Turbine. An air-driven turbine handpiece.

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