What's ET short for?
I know this one.
E is the 5th letter of the alphabet, T is the 20th.
520 was the year that John of Cappadocia died.
John of Cappadocia was the Patriarch of Constantinople.
The Fall of Constantinople was in 1453.
Johann Gutenberg invented the movable type printing press in 1453.
It was used to print the Gutenburg Bible
Which is also known at the 42-line Bible
42 is the Answer to the the question of life, the universe, and everything.