IOT COMMUNITY CHAT falls under "DIY & Hobbies"

Since WhatsApp is a messaging app that falls under technology, the categorization would be: Technology & Programming

Software Development & Programming (an unofficial entity name nicknamed 'sohbt cat') falls under "Technology & Programming".

Matematika isn't explicitly listed but falls under an educational topic category, I'd choose: Education & Learning

Referans Ve Sohbet falls under the category: Other / Unclassified

Based on the given information, Amzwatch falls under the category: Other / Unclassified

Mortal kamat stavka (jonibek) falls under the category of "Other / Unclassified" as it is not immediately clear what the nickname "jonibek" refers to, and it doesn't fit into the specific categories listed.

Software Developers falls under the category "Technology & Programming".

Crypto Discussion and pumping falls under: Cryptocurrency & Trading

By analyzing the title "@rasmiy_matematika", I would categorize this Telegram entity as: Mathematika (most likely stands for Mathematics) falls under 》 Education & Learning

AWS Community ===> falls under... Technology & Programming

Business & Finance **Reasoning:** The given title "Oil and gas Indonesia" falls under the umbrella of the business sector, specifically within the category of finance and commerce of oil and gas in Indonesia.