Google Cache is normally referred as the copies of the web pages cached by Google. Google crawls the web and takes snapshots of each page as a backup just in case the current page is not available. These pages then become part of Google's cache. Google web is usually updated in a few days. The actual time of the updates depends on the frequency the website updates itself.wiki
Web archive began in 1996 by archiving the Internet itself, a medium that was just beginning to grow in use. Today they have 20+ years of web history accessible through the Wayback Machine and we work with 625+ library and other partners through our Archive-It program to identify important web pages. wiki
Structured Data Markup Helper is orignally designed to help google crawling result by tagging html element wiki
Using pxxxy(vxn) is access website with middle computer, which normally is not supported by environment. But there are a website providing a brower with pxxxy built in without extra installation
Provide virtual browser sevice that can be used to read information on website. That orignally is designed to do website testing. We can image it is a browser inside another browser.