This document provides an overview of international business. It defines international business as any business activity that crosses national borders. The scope of international business is broad, as it involves operating in foreign environments with uncertain rules and ambiguous regulations. Conducting international business requires understanding factors unique to foreign markets. A firm's guiding principles should have a global perspective to help managers identify opportunities outside their domestic economy. The document outlines various strategic choices firms face when internationalizing, such as decisions around marketing, sourcing, management, and public affairs.