# Ontology & Taxonomy Notebook

A taxonomy sorts things into a tree, from broad to specific. An ontology also names how the things relate. This notebook keeps the ones that decide how businesses and products get filed: 6 industry and category lists with 73,261 categories, side by side, and the schema.org vocabulary that search engines document for structured data.

This is the markdown edition of https://venkatapagadala.com/notebook/taxonomy, the canonical page.

## Industry and category lists

All 6 lists on one page, with one search across them and a diagram of where their names overlap: https://venkatapagadala.com/industries (markdown edition: https://venkatapagadala.com/industries.md)

- [Google Ads Products and Services categories](https://venkatapagadala.com/industries/google-ads-categories): 3,180 categories, published by Google. Markdown edition: https://venkatapagadala.com/industries/google-ads-categories.md
- [ChatGPT V1 categories](https://venkatapagadala.com/industries/chatgpt-categories): 848 categories, a snapshot (where it comes from is below). Markdown edition: https://venkatapagadala.com/industries/chatgpt-categories.md
- [Google Maps place types (Places API)](https://venkatapagadala.com/industries/google-maps-place-types): 514 place types, published by Google. Markdown edition: https://venkatapagadala.com/industries/google-maps-place-types.md
- [Overture Maps places taxonomy](https://venkatapagadala.com/industries/overture-place-categories): 2,302 categories, published by Overture Maps Foundation. Markdown edition: https://venkatapagadala.com/industries/overture-place-categories.md
- [Shopify Standard Product Taxonomy](https://venkatapagadala.com/industries/shopify-product-categories): 64,292 categories, published by Shopify. Markdown edition: https://venkatapagadala.com/industries/shopify-product-categories.md
- [North American Industry Classification System (NAICS), 2022](https://venkatapagadala.com/industries/naics-2022): 2,125 codes, published by U.S. Census Bureau. Markdown edition: https://venkatapagadala.com/industries/naics-2022.md

OpenAI announced Businesses in ChatGPT on 10 November 2026 but has not published this category list. This page is a snapshot of the list in ChatGPT's business hub web app, read on 11 November 2026, and it may change. "V1" is this site's label.

## Vocabularies

- [Schema Swarm](https://venkatapagadala.com/notebook/schema): 3,025 schema.org terms, 45 search and AI engines. What each engine documents about structured data, checked against a page you choose.
- [The AI Intelligence Graph](https://venkatapagadala.com/notebook/ai/graph): the AI Notebook's map of the field. How the parts of AI connect, in the AI Notebook.

Canonical page: https://venkatapagadala.com/notebook/taxonomy