The Defense Advanced Research Projects Agency (DARPA) is a well-known name in the field of advanced research and technology development. However, there are a number of synonyms that are used interchangeably with the term DARPA. These include the Defense Sciences Office (DSO), Information Innovation Office (I2O), Microsystems Technology Office (MTO), Strategic Technology Office (STO), Tactical Technology Office (TTO), and Biological Technologies Office (BTO). Each of these offices focuses on a specific area of research, ranging from developing advanced military technologies to exploring new innovations in areas such as communications, computing, and biotechnology. Together, they form part of the larger Department of Defense (DoD) research enterprise, working to ensure that U.S. military remains at the forefront of technological innovation.