Yellow Pages
The Yellow Pages were 20th century telephone directories that listed where certain businesses are located and what their phone numbers were. 

Sulu, Scotty, and McCoy saw an advertisement for the  Yellow Pages when they were trying to figure out how to make a whale tank while visiting San Francisco in 1986. 

Pavel Chekov and Uhura also consulted the Yellow Pages in a telephone booth to assist them in locating the US Navy base in Alameda. ()

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