DD-700 · Learn · Explained in one drawing

Technology, explained in one drawing.

Plain-English guides to the ideas behind software and AI. One everyday picture, one diagram, no jargon.

Latest

Nov 3, 2026 · 5 min readWhat is a context window? Explained with a clerk's deskA context window is how much text an AI model can look at in one go: your instructions, documents, the chat so far and its own reply. Explained with a clerk working at a desk of fixed size.Read the explainer →
Nov 3, 2026 · 5 min readWhat is an AI agent? Explained with an assistant you send on errandsAn AI agent takes a goal, plans the steps and carries them out with software tools, checking each result as it goes. Explained with an assistant you send on errands.Read the explainer →
Nov 3, 2026 · 5 min readWhat is cloud hosting? Explained with a serviced officeCloud hosting means renting computing power from a provider over the internet and paying for what you use. Explained with renting a serviced office instead of owning the building.Read the explainer →
Nov 2, 2026 · 6 min readWhat is MCP? Explained with an office of service countersMCP (Model Context Protocol) is one shared way for AI assistants to connect to other software and use it with your permission. Explained with an office where every department takes the same request slip.Read the explainer →
Nov 2, 2026 · 5 min readWhat is RAG? Explained with an open-book examRAG (retrieval-augmented generation) makes an AI model look up the right pages in your own documents before it answers. Explained with an open-book exam instead of answering from memory.Read the explainer →
Nov 2, 2026 · 5 min readWhat is an API? Explained with a waiter in a restaurantAn API is a set of rules that lets one program ask another for data or a task and get an answer back. Explained with a waiter carrying orders between you and the kitchen.Read the explainer →

Index · A–Z · 10 explainers

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Frontend vs backend, explained with a restaurantThe frontend is the part of an app people see and use; the backend is the hidden part that stores data and applies the rules. Here's the difference, explained with a restaurant's dining room and kitchen.

Technology, explained in one drawing.

Latest

Index · A–Z · 10 explainers

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Latest

Index · A–Z · 10 explainers

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