Piano hammer e hollerith tabulator: o que têm em comum

1. Passo 1. Piano hammer — faz parte de — Piano. Hammers strike the strings.
2. Passo 2. Piano — inclui — Player piano. A piano.
3. Passo 3. Player piano — funciona como — Jacquard loom. A perforated medium controls a machine — a weaving one in one case, a musical one in the other.
4. Passo 4. Jacquard loom — utiliza — Punched card. Each punched card sets one pass of the pattern.
5. Passo 5. Punched card — é utilizado em — Hollerith tabulator. The 1890 census data was encoded on punched cards.

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