A family of Microsoft word processing software products for creating web, email, and print documents.
Thanks, Jim!
If you know XLM really well you might be able to craft a way to get rid of them.
I don't know XML at all :-(
Meanwhile, I removed the "mailings" ribbon, it didn't help (just moved the "tell me what you want to do" to the left...), but somehow afterwards suddenly the context ribbons reappeared.
Hmmm...