Here is a list of important 63 transaction codes used with SAP BC-CTS component (SAP Change & Transport System in Basis) coming under SAP BC Module. You will get more technical details of each of these SAP BC-CTS tcodes by clicking on the respective tcode name link.
Menu Path : Tools → Administration → Administration → Client Administration → Special Functions → Copy Transport Request
Menu Path : Tools → Administration → Administration → Client Administration → Copy Logs
Menu Path : Tools → Administration → Administration → Client Administration → Special Functions → Delete Client
Menu Path : Tools → Administration → Administration → Client Administration → Client Transport → Import Editing
Menu Path : Tools → Administration → Administration → Client Administration → Client Transport → Client Export
Menu Path : Tools → Administration → Administration → Client Administration → Client Copy → Remote Copy
Menu Path : Tools → Administration → Administration → Client Administration → Client Copy → Local Copy
Menu Path : Logistics → Logistics Execution → Internal Whse Processes → Communication with External Systems → ALE Administration → Services → Customizing Data → Transport Organizer
Menu Path : Tools → ABAP Workbench → Overview → Transport Organizer
Menu Path : Logistics → Logistics Execution → Transportation → Transportation Planning → External Planning System → ALE Monitoring → Services → Customizing Data → Transport System → Customizing Organizer
Menu Path : Tools → Administration → Administration → Language Administration
Menu Path : Logistics → Logistics Execution → Internal Whse Processes → Communication with External Systems → ALE Administration → Services → Customizing Data → Display Customizing Objects
Menu Path : Tools → Administration → Transports → Transport Management System
Menu Path : Tools → ABAP Workbench → Test → QA Worklist