The Software Engineering Institute (SEI) has been in the Capability Maturity Model (CMM) business since the late 80s. Resulting from the success of the Software CMM, in the 90s other CMMs began to proliferate. Rather than create and maintain a family of similar models, the SEI elected to combine several bodies of knowledge (Project Management, Systems Engineering, Software Engineering, Acquisition, Services, etc.) into one model framework, the Capability Maturity Model Integration (CMMI) released in December 2000. The CMMI describes best practices for the development and maintenance of products and services across the entire lifecycle. By integrating essential bodies of knowledge, the CMMI provides a single, comprehensive framework for organizations to assess their development and maintenance processes, implement improvements, and measure progress. This presentation provides a high level overview of the CMMI and its applicability to hardware development, systems engineering, software engineering, and/or acquisition organizations, benefits realized by organizations implementing the CMMI, and data demonstrating its international acceptance.