Version: Beta 0.1 This version has the following characteristics and problems: 1. The REJO language is the basis of the platform and therefore I have tried to have a stable version of it. The language have been tested with 2 applica tions that come with plateform: a Reactive Shell and a GUI (Graphical User Interface) and with a lot of little programs that are in the examples directory. The only component of the system is the kernel that, for the mo ment, isn't a REJO but it will be soonly. The REJO language handles: a) All the reactive instructions that are in the Junior interface. b) Events using Strings or Identifiers, and using logic expressions. c) All the other elements that make of REJO a language that defines a Reactive Object Model, for instance reactive methods, local variables in reactive methods, etc. No problems detected but some suspected ones... 2. The Reactive Shell (Rsh) allows users to type file command, to type reactive instructions (maybe using variables) and to execute REJOs and Scripts. However, in its graphical version it has some problems in the way of putting the cursor. In general it doesn't detect some syntax errors and for the moment scripts aren't REJOs so you can not kill them. 3. The GUI is a REJO application that offers an easy way of launching reactive shells, generating events and displaying graphical applications in a WorkSpace. The WorkSpace in under construction as well as a REJO version of Icobjs. The only problem that has been detected is the performance of the component that generates events. 4. The ROS kernel offers 2 interfaces: one for doing migration and another for loading REJOs locally. The migration service doesn't work and this will be the following thing to improve in the system as well as other agent services.