District 3's principal industry is technology. It is home to some of Panem's most brilliant minds, and is where most of the scientific, technological, and medical advances have been made. District 3 and District 6 have very close ties with each other, as District 6's principal industry is transportation. Engineers from both Districts collaborate with each other, to design the many transport systems that crisscross Panem. In the Hunger Games, tributes from District 3 were known for using ingenious methods to kill other tributes.
"Panem is one of the most advanced nation's in mankind's history, thanks to the efforts of District 3. Its computers keep us all connected, and its electronic gadgets keep us entertained."
The seat of government is Minerva, which is in the east of the District. The mayor is Minerva Wise.
The people of District 3 see not brute force, but intelligence as strength. They often name their children with names indicating wisdom or intelligence. Before the rebellion, in its place, people named their kids for mechanical objects, technological pieces, etc.