Dear -----, We are writing to invite you to write a survey paper to be included in Surveys in Approximation Theory (SAT). SAT, as the name implies, will be a web based collection of surveys in the area of approximation theory. These surveys are offered as a free service to the scientific community. We hope that SAT will prove useful for mathematicians in general and for approximation theorists in particular. It is our aim to present our subject in an accessible, organized and open and user-friendly fashion. SAT is not meant as a first-publication journal, nor a collection of electronic monographs or textbooks. These survey articles are meant to review specific topics while citing, explaining and assessing the most relevant, important and interesting aspects of the topic. We would like to invite you to write a survey paper on a topic of your choosing. We expect papers to be scholarly -- the author should know the subject! -- and to be written carefully so as to be comprehensible to some appropriate target audience (advanced graduate student and beyond). In other regards we are flexible. The topic might be active current research or neglected classical material. The length of the article is not a factor. There may or may not be an attempt to give a historical perspective. One can write in the style of a textbook chapter (with proofs of most results) or the conventional style of journal surveys (outlining proofs of major results). The essential requirement is that it should be interesting and informative to someone. If you are willing to write such a survey, please let us have a tentative title, a brief description of planned contents (this can be just a list of phrases, intended only for the Editors use in the unlikely event that two people choose the same topic), and an estimate of completion date. Please respond to ?? at ??. Have a look at our homepage: http://www.math.technion.ac.il/sat We subscribe to the notion that mathematical research and exposition should be freely available on-line. That should be the 21st century meaning of the word "publication". This is the motivation for SAT. Carl de Boor, Allan Pinkus, Vilmos Totik How exactly to archive things? See http://front.math.ucdavis.edu/overlays