From Forum Nokia Wiki

Since the introduction of Carbide.c++ 2.0 the OEM Edition has become an option developers can choose when they install the tool. OEM Edition is designed for Symbian developers who focus on Symbian kernel development. The Carbide.c++ OEM Edition includes the following: Crash Debugger Carbide.c++: Performance Investigator On-device Debugging (TRK) UI Designer

For more information, visit the OEM Edition features page on the main Forum Nokia website.