MP3 and lathe: what they have in common

1. Step 1. MP3 — uses — Algorithm. A compression algorithm.
2. Step 2. Algorithm — is used in — Program control of a machine. A program is a written algorithm.
3. Step 3. Program control of a machine — is used in — 3D printer. The layers are set by a program (G-code), as with CNC.
4. Step 4. 3D printer — has part — Lead screw. The axes are moved by screws.
5. Step 5. Lead screw — is part of — Screw-cutting lathe. The lead screw moves the cutting tool.
6. Step 6. Screw-cutting lathe — evolved from — Lathe. Maudslay added a lead screw and a slide rest.

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