There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time. There might have been a time when only one man did, because he was the only guy who caught on, before he wrote his paper. But after people read the paper, a lot of people understood the theory of relativity in some way or other, certainly more than twelve. On the other hand, I think I can safely say that nobody understands quantum mechanics.
“There is no reason for any individual to have a computer in his home.”
“Software comes from heaven when you have good hardware”
In fact, I have heard that the number of copies of it is over a 500 Million copies and it is even been suggested that there is no other program that has more copies installed than the RSA code, more than windows and netscape.