56 - It has been and continues to be fun. I started in College in 1969 in a physics class. "There's a computer down the hall (IBM 1130, cards, FORTRAN). Go figure it out and analyze your experiments." Since then I have been learning non-stop. I got my degrees in Math, but have had to learn about programming developments for decades. The other fun thing is that I have had to learn about what my users are doing: pharmaceuticals, banking, electric power, genomics, among others. I'm so rich. Enough money, great family, ever stretching horizons.