I would love a book for techno-idiots. It should tell me something I don’t understand, like What is

... I wish to know what terms like Wi-Fi , the cloud, and lots and lots more., mean.  Is Wi-Fi synonymous with "internet"? There are things like blue-ray, blue tooth.  I can't figure which HDMI port in the back of the tv to connect the HDMI cable. There are three openings. So I can't connect my new dvd player until I know what I am doing.  And Netflix talks about Blue-Ray...  I'm left in the lurch.  This is a tiny scrape off the tip of the iceberg that begins to list what is "geek" to me.  (be gentle)