Google has indexed many books, newspapers, photographic archives, images, videos, flash movies, PDFs, etc., and now they've added full archives of magazines. For example, I did a Google Book Search on "phone systems" and it returned a number of results from "Popular Mechanics".
A preview of the search results:
* New take-along telephone give you pushbutton calling to any number (1973)
* Here's Your Ultimate Telephone Center (1984)
* Phones on the Go (1984)
* How to Install Your ....
Virtual Observations - The CSI Call Center Blog
