In 1947, US telephone companies began using what?

More Questions:

What are the four primary ingredients in beer?

What dessert consists of ice cream covered in meringue and baked in the oven?

Until World War II, solid blocks of what was commonly used as currency in Siberia?

How many bends does a standard paperclip have?

What US city was the first Starbucks store opened in?

In 1992, which US state began offering tourist info at 1-800-33-GUMBO?

Which of the nine Muses was the goddess of dancing?

Phnom Penh is the capital of which Asian country?

What is the only National Park located in Michigan?

Everglades National Park is located in which US state?

What is a dromedary?

What disorder's name is derived from the Greek for "without appetite"?

'Little Bastard" was the nickname given to the Porsche 550 Spyder that killed what acting icon in a crash?

What soap opera was on air from 1952 until 2009?

Who invented the aerosol spray can?