front-end dev squarely falls into the realm of IT. What's your motivation to separate or "gatekeep" these fields?

IT is often used as a term referring to the more practical side of things - infrastructure management, sysadmin, and helpdesk type work. It's not really a limitation that I subscribe to but it's hardly uncommon. Maybe they were using that definition.

that is what I was getting at. I worked with someone in IT and their main focus was on preventing system from being exploited and helping people with their credentials or if other problems arose. I don't recall any coding work such as the actual functioning of the site. Their focus was more about keep the severs running.

One of the companies that I've worked at in the past had software developers in three main different departments.

There were developers in the classic engineering department - creating the product that gets sold. That's an easy one.

There were developers in the customer support department. This group was known as 'sustaining engineering' and developed the tools for the rest of the customer support department to use to diagnose and troubleshoot issues... along with identifying bugs that one customer has in the software (and then creating patch releases for those customers). They had some really interesting problems solved there like "how do you set up a remote debugger to look at a core file that is greater than 2gb in size?"

There were also developers in the IT department. Along with the sysadmins, DBAs, an helpdesk... the "Internal Business Applications" team was the one that maintained the corporate site, or did projects for other departments that didn't have the headcount for a full time developer of their own (sales department and the cornfugraiton tool). Developers also were the ones that did updates to the ERP and CRM systems. The customer support website was maintained as part of this.

So... the point is that IT can certainly encompass software developers. You'll often see this on various job sites - all of the computer technology jobs tend to get categorized under IT unless the company has a technology product of their own (and then separates it by engineering and IT).

> the "Internal Business Applications" team was the one that maintained the corporate site, or did projects for other departments that didn't have the headcount for a full time developer of their own (sales department and the cornfugraiton tool). Developers also were the ones that did updates to the ERP and CRM systems. The customer support website was maintained as part of this.

We usually call this "IS" (Information Systems). This usually goes hand in hand with IT as IT/IS.

In USA. Yes. But America only accounts for 4.1% of world population. So.

Information Technology is technology that involves information manipulation and storage. Development and software engineering are subsets of IT, infrastructure maintenance is another.

Computer Science has nothing to do with computers, or science. It is generally a mistake to read the name of something as defining that thing — it has almost certainly shifted meaning since it’s origin, especially if someone is arguing about it.

I disagree with you there. In Computer Science, you learn the science(determined truth) of computation(the act of mathematical calculation). The names of most degree programs are pretty accurate when you really parse the jargon.