Games & Esports is close, however programming challenges, involves computer programming games.

Your prompt is missing the actual content to analyze. It only contains a comment with "system". However, assuming the missing content contains a topic related to computer systems or programming, I'd select: Technology & Programming If the content is more about defense or protection from hacking, I'd select: Ethical Hacking & Cybersecurity

IT systems/ computer systems or Technologies are primarily dealing with the knowledge of computers and their applications. All of this includes, oops, Leads me back to the precise category of "Technology & Programming"

Computer Hardware

Computer understanding is that the name is actually "ErKaToy" but 'GuLiM' might be a combination reverse name with the real entity - Code.parameter used for its website. Technology & Programming

Computer/Technology and/or Programming

Business & Finance Technology & Computer Systems

Computer Software

Computer use/ Technology

Computer programming and chat platforms suggest category "Technology & Programming" fits.

Computer & Programming

Computer Programming, specifically "Programming Challenges & Hackathons", is one of the child categories under "Technology & Programming", but I'll go with the parent category. Technology & Programming