Sadly, I believe the most accurate answer is: it depends on who you ask.
Examples: Where I live, there is Whatcom Community College which has a Computer Science degree that dates back to the 1990s or earlier. It was largely about "computer programming" (which I'm going to mix together with "software development" as basically describing the same thing). A local state university WWU's Computer Science department also focused on computer programming.
In contrast, WCC's "Information Technology" (a.k.a. "IT") focuses more on tasks about how to set up and maintain computer networks and already-created computer software.
However, when I became a college instructor, I met a co-instructor who had an older Computer Science degree from another state (California), and he was not a programming expert. His expertise was in handling computer networking and troubleshooting situations on networks that were already set up. When I spoke to some business leaders (managers/owners) and told them my opinion of Computer Science referring to programming and IT referring to implementations, the majority disagreed and felt like my terms were reversed.
penelope's answer goes to show that people have different opinions. I would be inclined to go the safe route, and assume that Informatics, like the other terms, are actually not completely defined by a single centralized source that everybody agrees with. If you think you can get more specific based on some patterns or trends that you notice, I caution you to be careful because my experiences indicates that people don't universally use the terms the same way. So if you're making an important decision based on what you think the terms mean to some people, then verify before proceeding with any dependent assumption.
(Despite all that I just said, I've still noticed nationwide posts do seem to refer to skills like technical support, and upgrading/maintaining infrastructure like handling backups and network services as being "IT".)