Is this question from the missionary story?
Alexander the Great is important because by the age of thirty he had created one of the largest empires in ancient history. He was the ancient ruler of Macedonia, what is now north eastern Greece and as ruler he conquered most of the civilized world, from Greece to Egypt, Persia and India. He is known as one of the greatest commanders of all time and was undefeated in battle.
Answer:
Every three to six months you should do a thorough cleaning of your entire hardware system
around 3500 b.c. probably
