# Ontology & Taxonomy Search Engine This page puts six category lists side by side: Google Ads, ChatGPT V1, Google place types, Overture, Shopify and NAICS 2022. Together they hold 73,261 categories. Search them all at once, open any list as a tree on its own page, and see where the same name appears in more than one list. This is the markdown edition of https://venkatapagadala.com/industries, the canonical page, which adds the search across every list and the overlap views. Each list's full tree is in its own markdown edition, linked below. ## Counts - Lists: 6 - Categories: 73,261 - Same name: 2,180 categories whose name is in another list - Similar name: 243 in another list, and no same name there ## The lists ### Google Ads Products and Services categories - 3,180 categories, 22 top-level industries at the top, up to 7 levels deep - Publisher: Google; version: 2025-08-20 - License: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) - What it is: Google describes the file as ["Human-readable Products and Services categories and corresponding criterion IDs."](https://developers.google.com/google-ads/api/data/codes-formats#product-and-service-categories) - Page: https://venkatapagadala.com/industries/google-ads-categories - Markdown edition: https://venkatapagadala.com/industries/google-ads-categories.md ### ChatGPT V1 categories - 848 categories, 21 areas at the top, up to 4 levels deep - Snapshot; version: V1 (this site's label), read 2026-11-11 - No license: a snapshot, not a publication - Provenance: 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. - Page: https://venkatapagadala.com/industries/chatgpt-categories - Markdown edition: https://venkatapagadala.com/industries/chatgpt-categories.md ### Google Maps place types (Places API) - 514 place types, 2 tables at the top, up to 3 levels deep - Publisher: Google; version: 2026-11-09 - License: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), Google - What it is: Google says place types ["are categories that identify the characteristics of a place."](https://developers.google.com/maps/documentation/places/web-service/place-types) - Page: https://venkatapagadala.com/industries/google-maps-place-types - Markdown edition: https://venkatapagadala.com/industries/google-maps-place-types.md ### Overture Maps places taxonomy - 2,302 categories, 13 top-level categories at the top, up to 6 levels deep - Publisher: Overture Maps Foundation; version: 2026-10-21.0 - License: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), © Overture Maps Foundation - What it is: Overture says its new taxonomy and basic_category properties are ["designed to better categorize location entities such as businesses, landmarks, and attractions and facilitate search, display, and navigation in map applications."](https://docs.overturemaps.org/guides/places/taxonomy/) - Page: https://venkatapagadala.com/industries/overture-place-categories - Markdown edition: https://venkatapagadala.com/industries/overture-place-categories.md ### Shopify Standard Product Taxonomy - 64,292 categories, 26 top-level categories at the top, up to 10 levels deep - Publisher: Shopify; version: 2026-10 - License: [MIT](https://github.com/Shopify/product-taxonomy/blob/v2026-10/LICENSE), Copyright (c) Shopify - What it is: Shopify calls its taxonomy ["a universal language that empowers merchants to categorize their products."](https://raw.githubusercontent.com/Shopify/product-taxonomy/v2026-10/README.md) - Page: https://venkatapagadala.com/industries/shopify-product-categories - Markdown edition: https://venkatapagadala.com/industries/shopify-product-categories.md ### North American Industry Classification System (NAICS), 2022 - 2,125 codes, 20 sectors at the top, up to 5 levels deep - Publisher: U.S. Census Bureau; version: 2022 - Reuse: [census.gov open data statement](https://www.census.gov/about/policies/open-gov.html) - What it is: The U.S. Census Bureau says NAICS ["is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy."](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html) - Page: https://venkatapagadala.com/industries/naics-2022 - Markdown edition: https://venkatapagadala.com/industries/naics-2022.md ## Shared or only here Distinct names in each list (names that are equal under a rule count once), and how many of them also appear in at least one of the other lists. ### Same-name rule Same name: the two names are equal after lowercasing, trimming spaces at both ends and reading _ as a space. - Google Ads: 440 of its 3,180 names also appear in another list; 2,740 appear nowhere else. - ChatGPT V1: 441 of its 848 names also appear in another list; 407 appear nowhere else. - Google place types: 337 of its 514 names also appear in another list; 177 appear nowhere else. - Overture: 480 of its 2,302 names also appear in another list; 1,822 appear nowhere else. - Shopify: 420 of its 63,495 names also appear in another list; 63,075 appear nowhere else. - NAICS 2022: 20 of its 1,432 names also appear in another list; 1,412 appear nowhere else. - All six lists together: 70,604 distinct names. - Found in four lists, the most: Bakery, Fishing and Pharmacy. ### Similar-name rule Similar name: the two names are equal after lowercasing, trimming spaces at both ends, reading _ as a space, writing & as and, and dropping from either name a final s that does not follow another s, or a final es after s, x, z, ch or sh. - Google Ads: 490 of its 3,179 distinct similar names also appear in another list; 2,689 appear nowhere else. - ChatGPT V1: 462 of its 848 distinct similar names also appear in another list; 386 appear nowhere else. - Google place types: 340 of its 514 distinct similar names also appear in another list; 174 appear nowhere else. - Overture: 518 of its 2,302 distinct similar names also appear in another list; 1,784 appear nowhere else. - Shopify: 476 of its 63,472 distinct similar names also appear in another list; 62,996 appear nowhere else. - NAICS 2022: 57 of its 1,432 distinct similar names also appear in another list; 1,375 appear nowhere else. - All six lists together: 70,448 distinct names. - Found in five lists, the most: Hospitals, Museums and Saunas. ## How names are matched - Same name: the two names are equal after lowercasing, trimming spaces at both ends and reading _ as a space. - Similar name: the two names are equal after lowercasing, trimming spaces at both ends, reading _ as a space, writing & as and, and dropping from either name a final s that does not follow another s, or a final es after s, x, z, ch or sh. - A list is named under "Similar name in" only when it has no category with the same name. Table headings, group headings, areas and families are structure, not categories, and are not matched. - Names are compared by these two rules only, word for word as each publisher writes them: no translation, no fuzzy matching and no AI matching. A shared name is a shared name, not a claim that the two categories mean the same thing. Canonical page: https://venkatapagadala.com/industries