Hi, The slides and the Pharo code (with class comments :-) of my talk at the "Deep Into Smalltalk" Spring School are available at http://car.mines-douai.fr/noury/docs. The provided code covers the last two coding challenges of my talk: • Simple TCP server implementing a basic Twitter-like server. I show how to use Socket for handling client connections and SocketStream to deal with data exchange with a client. • Remote Messaging. The idea is to illustrate how to build a middleware similar to Remote Smtalltalk (rST) allowing message sends between objects located in different images. On the client side I show how to build a proxy, that is a place holder for a remote object. The proxy captures received messages and serialize them before sending the resulting bytes through a socket stream connected to the server. On the server side, a dispatcher recreates messages from received bytes and send them to the appropriate local object. Noury http://car.mines-douai.fr/noury -- -6th National Conference on “Control Architecture of Robots” 24-25 may 2011, Grenoble area, France http://car2011.inrialpes.fr/ -19th ESUG International Smalltalk Conference 22-26 August 2011, Edinburgh, UK http://www.esug.org/Conferences/2011 -19èmes Journées Francophones sur les Systèmes Multi-Agents (JFSMA’11) http://www.univ-valenciennes.fr/congres/jfsma2011/ 17-19 Octobre 2011, Valenciennes, France