Few weeks ago I got an email by a person who wrote a famous piece of software in 1971. He was given some software I had written and was asking me questions because he intended to make a few additions. My software was written in C#. I don't know what he used in 1971 but most probably it wasn't C. I have to admit that his questions made my day (or week). I learned that he is over 70 years old and programs every day. I hope I will be doing the same at his age.