Generally, but I am likely missing some stuff:

Computer Science: The underlying theory around making efficient computer software (I would consider the hardware side computer engineering)

Information Technology: the process of managing computer software and hardware systems for an organization

Software Engineering: the process of developing software including writing code, prioritizing features / bug fixes

Tech Support: part of IT. Troubleshooting and resolving issues with an organizations hardware and software systems

I’m not a swe but I work in technology doing solutions, so semi technical I guess. I recently did 6 rounds with a company with positive feedback after each round. They told me they needed to get through a few more candidates and would have an answer on if an offer was being made the following week.

1 week turned into 2 into 3. At the end of the third week I lied and said I had an offer and told them that I needed an offer from them or to remove me from candidacy. The opted to remove me.

I was working at a job, so I wasn’t stressing it but the process was just gross