Dear Colleagues, We are starting to organize the simulation and reconstruction sessions at LCWS07. The sessions will cover software and simulation frameworks, reconstruction algorithms and full simulation physics studies using the current software. If you would like to give a presentation please let us know as soon as possible and by May 7th. Sincerely, Norman, Akiya, Corrado, Mark Please send email to: [log in to unmask], [log in to unmask], [log in to unmask], [log in to unmask] The workshop web page is at http://lcws07.desy.de/