Linha de comando e watt steam engine: o que têm em comum

1. Passo 1. Linha de comando — evoluiu de — Typewriter. The teletype was a printing terminal.
2. Passo 2. Typewriter — funciona como — Movable type. Each typebar carries a piece of movable type pressed against the paper.
3. Passo 3. Movable type — faz parte de — Gutenberg printing press. Text is set from metal type.
4. Passo 4. Gutenberg printing press — evoluiu para — Rotary printing press. Cylinders instead of a flat press.
5. Passo 5. Rotary printing press — tem como parte — Watt steam engine. The first rotary presses were steam-driven.

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