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Merchant Category Codes [pdf]

https://www.citibank.com/tts/solutions/commercial-cards/assets/docs/govt/Merchant-Category-Codes.pdf
1•josephcsible•3h ago

Comments

josephcsible•3h ago
I found it interesting that there's a lot of super specific categories. E.g.:

* Commercial Footware [sic]

* Fireplace, Fireplace Screens and Accessories Stores

* Rubber Stamp Store

* Electric Razor Stores–Sales and Service

* Tent and Awning Shops

As well as the fact that every single airline, rental car, and hotel brand (e.g., Courtyard and Residence Inn separately, rather than one for all Marriott brands) gets its own MCC instead of there being one per industry like is the case for everything else.

Debian Technical Committee overrides systemd change

https://lwn.net/Articles/1041316/
1•todsacerdoti•1m ago•0 comments

2025 Moss Landing Vistra Power Plant Fire

https://www.readymontereycounty.org/emergency/2025-moss-landing-vistra-power-plant-fire
1•measurablefunc•3m ago•0 comments

Show HN: Thanks Stars – A CLI that stars all GitHub repos your project uses

https://github.com/Kenzo-Wada/thanks-stars
1•vvacla•5m ago•0 comments

Your self as a future adversary

https://blog.erlend.sh/your-self-as-a-future-adversary
1•erlend_sh•5m ago•0 comments

How Tailscale is improving NAT traversal (Part 1)

https://tailscale.com/blog/nat-traversal-improvements-pt-1
1•signa11•6m ago•0 comments

I am no longer at sentry [video]

https://www.youtube.com/watch?v=ob5PDZEmhMQ
1•bmn__•9m ago•0 comments

Async Django: a solution in search of a problem?

https://www.loopwerk.io/articles/2025/async-django-why/
2•Bogdanp•9m ago•0 comments

The Programming Languages Zoo

https://plzoo.andrej.com/
1•alabhyajindal•10m ago•0 comments

Radios, how do they work?

https://lcamtuf.substack.com/p/radios-how-do-they-work
1•aqrashik•15m ago•0 comments

TextEdit and the Relief of Simple Software

https://www.newyorker.com/culture/infinite-scroll/textedit-and-the-relief-of-simple-software
1•Kaibeezy•16m ago•1 comments

How AI is helping drive Desire at Scale across Unilever

https://www.unilever.com/news/news-search/2025/how-ai-is-helping-drive-desire-at-scale-across-uni...
1•leo_researchly•17m ago•0 comments

ICE Stockpiling Guided Missile Warheads and Chemical Weapons

https://www.thedailybeast.com/ice-stockpiling-warheads-and-chemical-weapons-as-lawmaker-fears-tru...
1•zerosizedweasle•20m ago•1 comments

VST3 audio plugin format is now MIT

https://forums.steinberg.net/t/vst-3-8-0-sdk-released/1011988
21•rock_artist•23m ago•5 comments

Programming with Less Than Nothing

https://joshmoody.org/blog/programming-with-less-than-nothing/
1•signa11•29m ago•0 comments

Documentation That Updates Itself from Your Code and Commits

https://docdriven.com
1•lion_bytes•29m ago•0 comments

Tesla profit falls short despite record sales

https://www.reuters.com/business/autos-transportation/teslas-record-revenue-tops-forecasts-tax-cr...
2•1vuio0pswjnm7•30m ago•1 comments

AI Workers Are Putting in 100-Hour Workweeks to Win the New Tech Arms Race

https://www.wsj.com/tech/ai/ai-race-tech-workers-schedule-1ea9a116
2•doener•38m ago•1 comments

What GPU pricing can tell us about how the AI bubble will pop

https://www.ft.com/content/d49707ae-5d6b-473e-9e2b-487d318e6fe9
2•KnuthIsGod•38m ago•0 comments

Our Voice-AI Assistant Hit Unit Profit – Thanks to Haiku 4.5

https://www.indiehackers.com/post/our-voice-ai-assistant-hit-unit-profit-thanks-to-haiku-4-5-8CKe...
1•Norcim133•39m ago•0 comments

Convention over LLM (CoL) – A novel approach to coding

1•pyeri•41m ago•0 comments

Meta's Alexandr Wang on why the AI team just laid off 600 workers

https://www.businessinsider.com/alexandr-wang-meta-superintelligence-labs-layoffs-memo-2025-10
2•nedsma•46m ago•1 comments

AI capitalism provokes the next financial crisis (German)

https://www.boersen-zeitung.de/konjunktur-politik/ki-kapitalismus-provoziert-naechste-finanzkrise
3•doener•47m ago•0 comments

Motor Temperature Estimation Without a Sensor

https://build-its-inprogress.blogspot.com/2019/10/motor-temperature-estimation-without.html
1•pillars•50m ago•0 comments

Reflections on My Tech Career – Part 1

https://randomascii.wordpress.com/2025/10/22/reflections-on-my-tech-career-part-1/
1•nikbackm•53m ago•0 comments

What it costs to keep up with the A.I. boom

https://messaging-custom-newsletters.nytimes.com/dynamic/render
1•doener•55m ago•0 comments

OpenAI, ARIA, and SEO: Making the Web Worse

https://adrianroselli.com/2025/10/openai-aria-and-seo-making-the-web-worse.html
1•tobr•58m ago•0 comments

Mosquitoes found in Iceland for first time after record heat

https://www.bbc.com/news/articles/clyz3vv62pgo
2•tellarin•1h ago•1 comments

Ask HN: Would you like some help with your OSS project?

1•seph-reed•1h ago•0 comments

A new API for interrupt-aware spinlocks

https://lwn.net/Articles/1039374/
2•pykello•1h ago•0 comments

Andreessen Horowitz lines up $10B for next wave of tech bets

https://www.ft.com/content/92262343-b4e0-406e-8a01-2199d45d719e
3•aarghh•1h ago•0 comments