The document summarizes the use of PostgreSQL in the Brazilian armed forces. It discusses how the Brazilian Army and Air Force have adopted PostgreSQL and other open source software to develop applications like Opus and Sisub. Opus is used by the Army to manage over 1,800 properties and support 5,000 construction projects annually. Sisub is used by the Air Force to manage food supply and procurement across 54 database servers in 19 states. Both organizations have realized significant cost savings and process improvements from using PostgreSQL and open source software.