This essay provides an overview of different types of business structures, organisation structures, business functions, and organisational culture and their impact on organisations and people within them. It discusses the advantages and disadvantages of sole proprietorship, partnership, and limited liability companies. It also compares and contrasts tall and flat organisation structures and explains the impact of human resource management, production, and marketing on organisations. Finally, it defines organisational culture and explains how a positive culture impacts the success of an organisation. The essay includes references from well-reputed sources.