hi the story of c builder delphi and rad studio is very similar to the story of visual c visual basic and visual studio in fact i suspect they may be cause and effect once upon a time when borland was in charge of development it only developed c builder and delphi two separate but highly compatible development tools they were two language specific ides i am not sure who came up with the idea of rad studio codegear or embarcadero but rad studio is like visual studio today rad studio supports both c builder and delphi languages buying rad studio is like buying both delphi and c builder only buying the two separately costs while buying only rad studio costs these prices of course do not include subscription costs best regards