Before search engines, we had personalized search results in the form of yellow pages. The yellow pages in Chattanooga are different than the Wichita. There wa

Before search engines, we had personalized search results in the form of yellow pages. The yellow pages in Chattanooga are different than the Wichita. There was no global yellow pages where plumbers from Odessa were listed beside plumbers from Tokyo, was there? If you were looking for something more esoteric, you were going to find different results in the World Christian Encyclopedia than you would in the Encyclopedia Britannica