what was the purpose of the "chain of fires" in ancient Greece?, To cook food for the army., To signal the successful return of a war party., To relate the news of the fall of Troy., To provide light for the signal towers, Two parallel columns of smoke meant a war party had returned successfully, true , fales, Why did Ray Tomlinson send the message "QWERTYUIOP" in 1971?, It was a secret code for the government., He was just testing out the system, It was the name of his computer., He wanted to start a revolution, Ray Tomlinson knew exactly that he was starting a revolution in communication., true, fales, How many email boxes were there at the end of the 20th century?, 4 billion , 263 million , 112 million , 177 million , The number of email users has grown to over 4 billion in the 21st century, true , fales.

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