Telephone Books
The first telephone book was published in New Haven, by the New Haven District Telephone Company in February 1878. It was one page long and held fifty names - no numbers were listed as the operator would connect you. The page was divided into four heading residential, professional, miscellaneous, and essential service listings.
In 1886, Reuben H. Donnelly produced the first Yellow Pages directory featuring business names and phone numbers, categorized by the types of products and services provided.
The history of 911 or the American emergency phone system.
Caller ID
In 1982, a patent for Caller ID was filed by Carolyn Doughty of Bell Labs.
