Apple and CITI to Team on mobile solutions for federal government agencies. CITI has signed a teaming agreement with Apple, Inc., of Cupertino, California, to work collaboratively and strategically to develop mobile solutions for select federal government agencies. In return for CITI delivering Apple product training to its technical staff and developing government-ready mobile applications, Apple will work closely with the Washington, DC-based company, providing both technical and marketing assistance for the purpose of growing a mobile computing center of excellence for the U.S. Government.