Unix and elevator: what they have in common

1. Step 1. Unix — inspired — Linux. A Unix-like system.
2. Step 2. Linux — is used in — Containers (Docker). Mechanisms of the Linux kernel.
3. Step 3. Containers (Docker) — works like — Shipping container. Standard packaging for an application — like a shipping container for cargo.
4. Step 4. Shipping container — is used in — Container crane. It moves containers.
5. Step 5. Container crane — has part — Wire rope. Cables.
6. Step 6. Wire rope — is part of — Elevator. The car hangs on cables.

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