A person who loads and unloads cargo from ships at a dock, or a software platform that lets computer programs run consistently anywhere.
From 'dock' (the waterfront area where ships are loaded). The modern computing meaning (Docker software) uses the metaphor of containers being moved, like in shipping.
Docker the software company named itself after dock workers because they both do the same thing—move containers from one place to another—and programmers found that metaphor so good it actually became the industry standard!
Complete word intelligence in one call. Free tier — 50 lookups/day.