Dear Colleagues, Here is the formal announcement for the upcoming ECFA-DESY Study meeting in Amsterdam. Norman The 4th WORKSHOP of the EXTENDED ECFA-DESY STUDY 'Physics and Detectors for a 90 to 800 GeV Linear Collider' ========================================================= will be held at NIKHEF, Amsterdam, The Netherlands, April 1-4, 2003. The web site of the workshop is now open for registration, at http://www.nikhef.nl/ecfa-desy Looking forward to welcome you in Amsterdam, Jan Timmermans, for the Local Organizing Committee