CAN bus and screw press: what they have in common

1. Step 1. CAN bus — is used in — Engine control unit. Linking the units.
2. Step 2. Engine control unit — has part — Microprocessor. A microprocessor.
3. Step 3. Microprocessor — evolved into — Microcontroller. A processor with peripherals on the chip.
4. Step 4. Microcontroller — is part of — Printer. A controller processes the print job.
5. Step 5. Printer — works like — Gutenberg printing press. A printer is a personal printing press: it transfers an image onto paper.
6. Step 6. Gutenberg printing press — has part — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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