The correspondents are:
Oliver Sacks, Carmen Sapienza, Theodore Sarkin, Dr Shankar Sastry, Peter Sauhl, Dr Joesph H Schaeffer, Eugene Garfield (The Scientist magazine), Dr Hasso Schroeder, James H Schwartz, Dr Terry Sejnowski, Professor Anthony Serafini, Dr Robert Shapley, Tim Shallice, Paul Shapshak, Dr S B Sharma, Dr Alexis Shelokov, S Murray Sherman, Mikio Shimizu, Dr Charles Sibley, Ralph M Siegal, Dr Nathan Silver, Dr Maxine Singer, Dr Ralph Simon, Professor Wolf Singer, Dr John W Singleton, Dr Jean-Paul Spire, John Bryant (regarding his paper "A Skeptical Look At The Skeptical Inquirer"), James E Skinner, Judith C Zola (Sleep Science Information Center), Steven B Smith, Dr Warren E Smith, Dr Paul Smolensky, Professor Henry M Sobell, Dr Paulo Soleri, Guy Sorman, Professor Larry R Squire, Harry Stanton, Dr Earl D Stedman, Mrs Jean Stein, Professor Dr Helmut Steiner, Peter Sterling, Marc I Stern, Chuck Stevens, Dr Oswald Steward, Dr Walter W Stewart, Hilton Stowell, Steven Strogatz, Lubert Stryer, Dr Stuart Sutherland, Jeff Swert, Edward J Sylvester, and John Szentagothai.