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

Writing isn't explicitly listed but falls under categories such as Technology and Programming, Freelancing, and Entrepreneurship or primarily and MOST RELEVANTLY Education & Learning

Chatbots, to be more specific, falls under "Technology & Programming" but "Chatbots, Bots" is not listed here so "Other / Unclassified" is not applicable.

Automated Testing and Manual testing falls under Technology & Programming.

Games (category does not perfectly fit, however, Games not present here so alternative and relevant to the "last odyssey" this falls under is) - Technology & Programming

Other / Unclassified is too nonspecific for Mega 1k+, but that is the category choice. I want to say this falls under "Programming Challenges & Hackathons," but more accurately, it would be under "Gaming & Esports" or "Technology & Programming" given "Mega" implies a specific game.

Information not provided in prompt, but if you're referring to the Telegram entity, its title is 'Telegram', and it is a Messaging app which falls under the category of 'Technology & Programming'.

RealmeOne falls under "Technology & Programming".

Based on 'Unlimited Airdrop Referral' we can't get a category directly, however, 'Blockchain & Web3' is likely the most specific category that it falls under, since airdrop usually relates to crypto or blockchain technology distribution.

I'm unable to give you an answer as to which category 'Private' falls under. I will be giving you a name of a category to decide if it fits, so go look up for the exact fitting one: Technology & Programming

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

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