Transport and Change Management 
Any changes that you make to programs and system configurations are recorded by the SAP system in the Change and Transport System (CTS).
Any changes to Repository objects that you manage in the CTS apply in all clients. However, you can also make client-specific developments and transport them into the relevant clients only.
Tools
Transport Organizer: The Transport Organizer manages the software changes you make in an SAP system in change requests.
Transport Management System (TMS): The Transport Management System accepts released change requests from the Transport Organizer and transports them through the configured system landscape until they reach the production system.
As well as the transport of software changes, you also use the TMS as a tool for configuring system landscapes.
Tasks
For a description of the tasks you perform with the Transport Organizer, see Working with the Transport Organizer.
You use the Transport Management System to perform the following tasks:
More Information
The technical transport of software at the operating system level is performed by the programs R3trans and tp. For more information, see the documentation for the Transport Tools.