T codesOX14 to valuation levelOx09 to define store locationOmsr -- assign field to field selection groupsOms9 Maintain Field Selection for Data ScreensOmsy -- Maintain Company Codes for Materials ManagementOms2 -- Define Attributes of Material TypesMmnr -- Define Number Ranges for each material typesOmt4 define attributes of system messagesOmsf -- to define material groupsMe9a -- to print/transmit rejection rfq to vendorMe9f to print / transmit rejection purchase orderMkvz- list of vendorsMe2l- list of purchase ordersOmt3b- to define structure of data screens for each screen sequence in material masterf-44 to clear vendor fi documentsobclcompany code settings for non taxabale code