Parchment e micrometer: o que têm em comum

1. Passo 1. Parchment — é material para — Códice. Early codices were made of parchment.
2. Passo 2. Códice — é utilizado em — Gutenberg printing press. The press printed sheets that were bound into codex books.
3. Passo 3. Gutenberg printing press — tem como parte — Movable type. Text is set from metal type.
4. Passo 4. Movable type — funciona como — Interchangeable parts. Movable type is an early case of interchangeable parts: identical letters move from line to line.
5. Passo 5. Interchangeable parts — utiliza — Micrometer. Precise measurement ensures interchangeability.

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