OMG has adopted, or is in the process of adopting, specifications for a number of ``services'' as part of the CORBA standard. These services consist of descriptions and IDL specifications for modules to perform various common software engineering tasks such as transaction management, concurrency, security and so on. It is hoped that software vendors will provide modules implementing these descriptions, and that software developers will use them, thus allowing users to mix and match software modules and reducing software development time by avoiding duplication. Currently few of the CORBA services have commercial implementations available, and it will be some time before implementations of many of the services become available.