Lisp and electrical telegraph: what they have in common

1. Step 1. Lisp — is used in — Expert system. They were written in Lisp.
2. Step 2. Expert system — evolved into — Chess computer. Symbolic AI.
3. Step 3. Chess computer — is a kind of — Supercomputer. Deep Blue was an IBM supercomputer.
4. Step 4. Supercomputer — is used in — Weather forecast. Numerical forecasting.
5. Step 5. Weather forecast — uses — Electrical telegraph. Collecting reports by telegraph.

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