This document discusses various classifications and types of food service operations. It categorizes food service into commercial establishments that aim to maximize profits through food and drink sales, and institutional catering that provides volume meals for organizations. It also outlines different types of restaurants including quick service, mid-scale, upscale establishments as well as different styles of operations like bistros, brasseries, cafes, and themed restaurants. The document details various services models in restaurants like table service, self-service, and single point service.