The giga is a two-stringed bowed zither found in Latvia.

The German Institute of Global and Area Studies (GIGA) is a German research institute. It analyses political, economic and social developments in Africa, Asia, Latin America and the Middle East and combines this analysis with innovative comparative research on international relations, development and globalisation, violence and security, and political systems. The GIGA advises the Federal Foreign Office and other branches of the federal government. Since 2009 it has had an office in Berlin.

Giga ( or ) is a unit prefix in the metric system denoting a factor of a (short-form) billion (10⁹ or ). It has the symbol G.