Harvard Mark I and rocket: what they have in common

1. Step 1. Harvard Mark I — uses — Punched card. The program was read from punched tape and the data from punched cards.
2. Step 2. Punched card — is made of — Paper. Punched cards are stiff card.
3. Step 3. Paper — is material for — Rocket. The first rockets were paper tubes filled with gunpowder.

Open Evothings