We consider some dependability management systems(IEC300, NASA AHB5300.1 and DIN VDE 0801) with reference on IEC300. Part I of IEC300(IEC300-1) covers the essential features of a comprehensive dependability programme for the planning, organization, direction, and control of resources to produce products which will be reliable and maintainable. We consider the contents of IEC300-1; scope, normative references, definitions, management responsibilities, product or project independent programme elements and project specific programme elements.