What They Mean

Tech concepts for non-developers — one idea per screen, shown rather than told.

What is an API?

Every pretty app is really just data, drawn nicely — peek behind one and watch the request fetch the raw JSON underneath.

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What is a database?

A spreadsheet many machines can share at once — flip between its sheets and ask it precise questions.

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What is ETL?

Three mismatched feeds become one clean table — watch each row get extracted, normalized to a shared shape, and loaded in.

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What is a data platform?

The whole stack as one wiring diagram — ingest, bronze, silver, gold, backend, agent, app. Send a single coffee sale down the wires, block by block.

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What is RAG?

Ask a handbook a question — one model turns the words into numbers to find the right paragraphs, a second writes the answer from them. Two models, two jobs.

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Who holds the stack?

Data engineer, data scientist, backend, frontend, full stack — pick a role and watch the layers of the stack it owns light up.

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