Perhaps you confused it with the frameset and frame?

frameset: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...

frame: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...

iframe: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...

If you're looking at any web page with ads or tracking, it has many iframe elements. The javascript that loads them usually creates an iframe and the ad appears there. A typical newspaper site could have 5-50 iframes on each page.

Really? I'd say image maps was the name I haven't heard in a long time... As in I read a couple of paragraphs before it dawned on me that it was _that_ type of image maps that post was about - I first thought it was something regarding rasterized maps (like OpenStreetMap or something)

How would you embed a pdf view in a page?