in 80s they made caller id for telephone  in 1990 they integrated it with computer, so when your phone rang, you would get a popup showing you who was calling, and whatever info you had on that person could be added into database and notes very handy for a salesman, grifter, who pretends to be your friend when you are ordering something. "hey bill how are you" 1992 this was used by pizza delivery companies. intended to save time, you could call and simply say "send me the usual" and hang up. they already had your account on the screen in front of them before they answered the phone, and could send your usual order out. but the pizza companies quickly discovered that most of their customers didn't like being spied on.  they know who you are when you call to order a pizza, but they play dumb.  credit card companies track and map where you use the card, what you buy, your routine, they flag some of your purchases, add you to lists, and they sell your data. cell phones do this 24/7 in 2015 facebook revealed that while they made money from advertising, the majority of facebook's 80 billion dollar profits that year came from selling your data.
United States