In April 2008, DARPA published a book DARPA: 50 Years of Bridging the Gap, in commemoration of the Agency’s 50th anniversary. To obtain a copy of the book, send an email to jan.walker@darpa.mil, or view the electronic version of the book’s articles below.

• Letters and Notices Celebrating DARPA’s 50 Years

  Dr. Robert M. Gates, U.S. Secretary of Defense
  Dr. Anthony J. Tether, Director of DARPA
  From the Congressional Record, February 7, 2008: In the Senate
  From the Congressional Record, February 7, 2008: In the House of Representatives

• 50 Years Timeline
• 50 Years of Innovation and Discovery

  DARPA has performed a unique role and continues to be DoD’s “Chief Innovation Agency,” pushing the frontiers of what is possible for the benefit of national security and the nation.

• Revolutionizing the Commercial Marketplace

  There are many example of how DARPA’s technologies have changed civilian lives and made an impact on the commercial marketplace.

• Transforming the Warfighting Landscape
  DARPA’s Land Warfare Programs Have Influenced Battlefields Around the World

  The M-16 and Javelin weapons are only two of the DARPA technologies that have influenced how land warfare is fought today.

• A Driving Force
  DARPA’s Research Efforts Lead to Advancements in Robotics and Autonomous Navigation

  To enable a robot to scan a situation, make an informed decision and act on it is has been part of DARPA culture almost from day one.

• The Story of GPS

• Detecting the Threat
  DARPA’s Role in Confirming the Integrity of the Partial Nuclear Test-Ban Treaty

  DARPA’s nuclear test-detection role was pivotal in keeping the Cold War cold; the technologies and processes developed pierced veils of secrecy that benefited the entire world.

• DARPA Paves the Way for U.S. Efforts on Ballistic Missile Defense

  Ballistic missile defense (BMD) has been part of ARPA's charter since it was established in the shadow of Sputnik in 1957. The BMD work it accomplished in those years has lived on.

• AntiSubmarine Warfare

  If sensors could be used to isolate seismic movement, couldn’t they be used to isolate submarine movement as well?

• DARPA and the Information Age
  Agency Activities in Information Technology Have Helped to Create Today’s IT Experience

  While the Internet is perhaps DARPA’s biggest legacy and cognitive computing is one intriguing approach for the future of information technology, DARPA is aggressively pursuing a panoply of other high-risk approaches as well.

• DARPA and the Internet Revolution

  DARPA's involvement in the creation of the Internet began with an idea to link time-sharing computers into a national system.

• Networks: Adapting to Uncertainty

  The Strategic Technology Office (STO) has been at the forefront of providing U.S. warfighters with robust, self-forming, and self-defending networks at the strategic and tactical levels.

• Next-generation Supercomputing: Efficient, Affordable, and Robust

  March 11, 2002, was a turning point for supercomputing – and for the history of DARPA’s role as an incubator of transformational computing research and development.

• Translation Technology

  Translations are critical to decision-makers on all levels to properly gather intelligence and understand how people respond to U.S. actions.

• Quantum Information Science

  While atom-sized circuits may bring an end to Moore’s Law, these quantum mechanical systems also bring new opportunities.

• Connection to the Cosmos
  From Its Space-age Beginnings to Its 21st Century Programs, DARPA Is Intertwined with Space

  The launch of Sputnik spurred the space race, ARPA’s beginnings and U.S. advancement into the final frontier.

• Packing Power into Tiny Packages
  DARPA’s Work in Microsystems Technology

  To operate efficiently, strategic and tactical sensor and communications systems require small, compact microelectronic components – now known as microsystems.

• Lighter, Stronger, More Affordable
  DARPA’s Quests in the Realm of Materials Science

  Although humans have used, studied, and improved materials since before our earliest records, materials research as a multidisciplinary thrust is a relatively young science.

• DARPA's Legacy Takes Flight: Contributions to Aeronautics

  Many of the key advances that facilitated the revolution in military aviation are the direct result of investments made by DARPA.

• DARPA’s Stealth Revolution: Now You See Them ...

  Signature management goes back over 100 years, beginning with camouflage designs on warships and later being applied to aircraft and eventually to submarines as well.

• DARPA’s Bio-Revolution

  DARPA's Biological Warfare Defense Programs aim to protect U.S. military forces from biological warfare attacks and naturally emerging infectious diseases. DARPA's Revolutionizing Prosthetics effort is developing a prosthetic arm and hand that will restore an upper extremity amputee to full functional capability. DARPA's Fundamental Laws of Biology program seeks to bring a completely new understanding to biology and, as a result, to provide tangible benefits to the warfighter.

• Preparing Warfighters for the Urban Stage

  Conducting military operations in urban areas has always been difficult and particularly dangerous.

• Alternative Energy

  New technology explorations can be found in a variety of programs such as Palm Power, BioFuels, Very High Efficiency Solar Cells (VHESC), and High Energy Distributed Lighting (HEDLight).