The CLB - COM+ Catalog File is a file that performs a specific service on the Windows operating system that facilitates certain components t communicating with one another. The CLB - COM+ Catalog File was designed and developed by Microsoft to be compatible with Microsoft COM+. This particular application consists of a number of elemental components such as COM+ application, computer level attributes, and class. This file is capable of storing certain data that provides a consistency across the computer services. As a general rule this type of file is normally found in the COM+ registration database.