under the hood

[hot-rodder talk]

1. Used to introduce the underlying implementation of a product (hardware, software, or idea). Implies that the implementation is not intuitively obvious from the appearance, but the speaker is about to enable the listener to {grok} it. "Let's now look under the hood to see how ...."
2. Can also imply that the implementation is much simpler than the appearance would indicate: "Under the hood, we are just fork/execing the shell."
3. Inside a chassis, as in "Under the hood, this baby has a 40MHz 68030!"

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