Communications satellite and screw press: what they have in common

1. Step 1. Communications satellite — has part — Solar panel. Power comes from solar panels.
2. Step 2. Solar panel — is part of — CubeSat. Power comes from solar panels.
3. Step 3. CubeSat — has part — Microcontroller. On-board electronics.
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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