In telephony, what do the initials ISDN stand for?

More Questions:

In the Western Union's alphabet what is the letter "C" known as?

How many throwing events are there in a decathlon?

How high is the crossbar on a football goal post?

In which Shakespeare play does Antonio owe Shylock a pound of flesh?

Who wrote the novel "Carrie" in 1973?

In Charles Dickens" "Oliver Twist', what is the name of the man who trains boys to steal for him?

What tale of the cross-dressing Leonore was Beethoven's only opera?

What is Alaska's largest lake?

What year were X-rays discovered?

What is a group of owls called?

Who plays The Car in the TV show "Red Dwarf"?

Randy Poffo, who was a pitchman for Slim Jim, was better known by what name?

In which movie marked the first appearance of Charlie Chaplin's character, The Tramp?

What year did the Space Race between the United States and the Soviet Union start?

What US state is the comics series "Revival" based in?