During NLO 2011 there will be a symposium celebrating the 50th anniversary of nonlinear optics. I don’t want to emphasize the well-known speckle which was removed from the famous paper in Physical Review Letters by P. Franken, et al., demonstrating nonlinear optical effects for the first time appeared in 1961. I do want to pay tribute to the great scientist Raman here. Let us start with a question: When Raman observed Raman scattering in 1928, there was no laser. What was his light source? (I wish I had prizes for correct answers!) The answer----“The apparatus used by Raman for the discovery consisted of a mirror for deflecting sunlight, a condensing lens, a pair of complementary glass filters, a flask containing benzene and a pocket spectroscope. the total cost not exceeding $25 ” [1] Raman observed not only the Stokes radiation, which has the lower photon energy than the incident photon, but the extremely weak anti-Stokes radiation. Below are a few notable things that I know about t...