Usefull SAP Administration Transaction Codes regroups the most important SAP Basics Tcodes. Keep the list in your favorite if you are working as technical ( developer or basics ) in SAP fields, you need to check some parameters or check if an RFC connexion is
SAP Tcodes workbench :?The ABAP Workbench is a collection of tools you use to develop, test and run ABAP programs. The following section is an overview of the tools available for performing different development tasks.?