ENGINEERED SELF ORGANIZATION IN NATURAL AND MAN-MADE SYSTEMS Nadav Raichman 1 , Tamir Gabay 2 , Yael Katsir 1 , Yoash Shapira 1,2 and Eshel Ben-Jacob 1,3 School of physics and astronomy, 1 Raymond & Beverly Sackler Faculty of Exact Sciences, 2 TAU Institute for Nano-Science and Nano-Technology, Tel-Aviv University, Tel-Aviv 69978, Israel 3 communicating author, Telephone no.:972-3-6407845, Fax: 972-3-6422979 eshel@tamar.tau.ac.il Abstract We present here the recent developments in the studies of self-organization in abiotic, biotic (bacterial) colonies and man-made (programmable chips) systems, aimed at seeking to unravel the general principles of biotic self-organization. A typical bacterial colony consists of 10 9 - 10 12 bacteria. It is not created by pre-design or according to a plan, but through a process of biotic self-organization. The elements (bacteria) store the information for creating the needed ”tools” and the guiding principles needed for the colonial self-organization. Additional information is cooperatively gen- erated as the organization proceeds following external stimulations. The outcome is an adaptable complex system that can perform many tasks, learn and change itself accordingly. Consequently, the idea of engineered self-organization is to let many collections of element self-organize in a pre-engineered environment they can exchange information with. The most efficient collections will be let to further self-improve via evolution algorithms of the components internal structure and capabilities (the analog of evolution of the potential for gene expression). The system itself should regulate the evolution of its components. 1. Introduction The current engineering methodology is that of system-building ac- cording to some pre-designed blueprint seeking the most elegant and eco- 1