Thank you Jelly Bean & Starbuck. No, Jelly Bean I'm not offended by your reply. You're quite right that I'm lazy. I might also describe this as not wanting to spend time unnecessarily looking things up or getting a book that is only somewhat helpful. You're quite right that I'm a Silver Surfer.
To make it clearer what I am looking for. What I want is a book that describes the development of computer and related technology from (if possible) both an historical and a technological viewpoint so that I will be able to get an overall view of this development and see how the various details fit in as well as knowing how the various "bits" fit in and what the words mean. Do you know if such a book exists and, if so, the title and author.
A possible alternative might be a (preferably free) online course that will give me the same information.
Best wishes, PeterD