We are pleased to announce the completion of a major software programme which we have been helping to manage with HTTP (see previous issue). Over 60,000 lines of highly technical C++ code have been delivered in a project which started in late February. We have great hopes for the software, including breakthroughs in cancer detection and many forms of forecasting. Now, can anyone explain what "stochastic" means? Answers on 23 postcards to Jeremy Smith.