[ARC5] Speaking of Cautionary Tales

[Robert Eleazer]

Here's a strange one for y'all to ponder.

A few weeks back John Foster and I were exchanging personal e-mails about design of DC to AC inverters.  

Now, for some time I have noted that if I go to some sales websites and look some items, when I go to other news and information websites the pop-up adverts often will be from those same sales websites showing those same items.  Obviously, they are reading the cookies left by those websites and are figuring out what I am interested in and showing me that in the ads.

But very soon after John and mine's discussions on inverters, on one of the news and info websites I got a pop up advert for DC to AC inverters.  I had not gone to any sales website and looked for those items, since John and I were discussing the design of one I had built a long time ago.

So how did that know about that if they were not reading my e-mails as well as the cookies?

Wayne