The main departments in a hotel or resort are housekeeping, guest services, event planning, sales and marketing, food preparation, food and beverage service, and purchasing. These departments include front office, management, food & beverage, kitchen, security and maintenance, and human resources. Other support services such as finance, accounting, and information technology are also crucial for keeping a hotel operational. The diverse team of skilled specialists with backgrounds in various areas is essential for the successful operation of a large hotel.