The document provides an overview of aids to trade, specifically focusing on banking and its various types, including commercial, cooperative, specialized, and central banks. It highlights the functions of commercial banks, such as accepting deposits, providing loans, and facilitating fund transfers, as well as the impact of e-banking on service availability. Additionally, it discusses the roles of banks in international trade, the importance of letters of credit, and the challenges faced by agricultural borrowers, emphasizing the diverse career opportunities within the banking sector.