This section covers a wide range of topics related to business and economics. It includes discussions on trade (both balance of trade and international aspects like tariffs), commerce (encompassing boards of trade, chambers of commerce, and merchants associations), business practices (accounting, bookkeeping, advertising, business communication, ethics, mathematics, and records management), marketing and sales (including retail, secondhand trade, and shopping centers), organizational management (office management, personnel management, and industrial psychology), financial aspects (banking, foreign exchange, and insurance), and economic perspectives (economic history, theory, demography, and geography, including the economic geography of oceans). The section also explores specific areas like the black market, canvassing, department stores, and vocational guidance, aiming to provide comprehensive insights into the multifaceted world of business and economics.