Concentric Data Systems USA: Concentric Data Systems, Inc. 110 Turnpike Road Westborough, MA 01581 Tel: +1-508-366-1122 Fax: +1-508-366-2954 Concentric Data Systems UK R&R Software Limited Viking House, Denmark street Maidenhead Berkshire SL6 7XJ Tel: +44-628 788181 Fax: +44-628 788182