ZACKBACK International, Inc.   Booth 667   Dennis Zacharkow P.O. Box 9100 Rochester, Minnesota 55903 USA 800.SITTING zmail@zackback.com www.zackback.com   ZACKBACK Elite, the world's first computer posture chair, prevents the slumped postures promoted by traditional chairs. ZACKBACK's exclusive dual back support system provides customized support for productive, pain-free sitting.