They're releasing macOS a whole month earlier than usual, with fewer beta releases than usual. I believe this is the first time they will have released macOS and iOS on the same date.
When I got a job in academia and was faced with creating my first conference poster, I was amazed to discover PowerPoint is the customary software for creating them. It does a pretty good job, too.
This happens a lot in PDX and it makes me furious. It's like putting a hit out on the pedestrian crossing the street. I would like to see how the people honking their horns would like it if someone called for their death.
This is a good basic overview, goes beyond tagging/indexing, was the textbook in LIS501 Information Organization and Access at UIUC-GSLIS (now the iSchool at Illinois) in 2006:
No, it's old, and an outdated mindset. Since 2004 Wikipedia has greatly matured and most educators have relaxed their stance on it. I'm a librarian and my take on Wikipedia is that it's a great starting point but you'd never want to cite it directly.