Weather balloon and hollerith tabulator: what they have in common

1. Step 1. Weather balloon — has part — Radio. A radiosonde.
2. Step 2. Radio — evolved into — Mobile phone. Mobile communication is a development of radiotelephony.
3. Step 3. Mobile phone — has part — Integrated circuit. Inside a phone are microchips: processor, memory, radio.
4. Step 4. Integrated circuit — is part of — Mainframe. The hybrid circuits of the System/360.
5. Step 5. Mainframe — evolved from — Hollerith tabulator. IBM grew out of Hollerith’s company.

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