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Computer Science, a popular college major, has one of the highest unemployment rates
(www.newsweek.com)
This is a most excellent place for technology news and articles.
My employer considers developers, infra, SRE, PC Support, even QA all to be part of the "IT department". I've always used the term "IT" to just cover any specifically "tech" sort of function. As opposed to, say, finance, sales, HR, operations, etc.