Unable to find ‘ios technology overview’ webpage


This is not a technical question. But at the end of the day I decided to raise here, so that maybe I can get any clue what has happened to “iOS Technology Overview” webpages of Apple. It had lots of information about iOS Technology and layers. DO others are also facing the issue of accessing this page?

I am trying to search Apple webpage which earlier had title “iOS Technology Overview”, but unable to search it out. I am getting “Mac Technology Overview” but not for iOS. In few other iOS Programming Guides, link to “iOS Technology Overview” is disabled/missing but they have corresponded to Mac.

DO you anyone have any idea regarding this?