Communication and Messaging (correspondingly would be slightly adjusted as) Social Software is related to use of messaging app which is Very close to one of the categories listed below. Technology & Programming however best fits.

Based on the provided information, the category "Technology & Programming" is the most fitting for API- Ace Petroleum Engineering as it involves API, which is an interface used to interact with systems or other software.

Office Software

Software Technology is not an option but 'things related to the entity, which is a messenger application, fit under: Entertainment & Media

You didn't provide a title. The description indicates something about a "Patch" but it doesn't specify the type. Assuming it's related to hardware or software, it could fit into the "Technology & Programming" category, however, with the description being a one or two digit code (RZ-25), it could possibly relate more to gaming or Aerospace, but neither are clear enough for me to fit neatly into those respective categories, so I think I'd default to Technology & Programming

Software industry