(1) The Principal Investigator/Project Director/Program Director (PI/PD) is the individual designated by the grantee, and approved by the sponsoring agency, who will be responsible for the scientific or technical direction of the project. If more than one, the first one listed will have primary responsiblity for the project and the submssion of reports. All others listed are considered co-PI/PD, and share in the responsiblity of the scientific or technical direction of the project. The term "Principal Investigator" generally is used in research projects, while the term "Project Director/Program Director" generally is used in education, and service projects. For purposes of this glossary PI/co-PI is interchangeable with PD/co-PD. (2) The individual bearing primary responsibility for all essential aspects of the project or protocol, including programmatic work, compliance with government, sponsor and university policies and regulations, fiscal stewardship of sponsored funds, and all administrative requirements of the project. The Principal Investigator (PI) is the primary individual involved in the design, conduct and reporting of the sponsored project. In most cases, the PI is also the Project Director (PD). In cases where the PI is not eligible to be the PD (such as pre-doc graduate fellowship grants), the institution may name a mentoring faculty member as the PD.