2. Fast food. The rise of fast food restaurants in the 20th century was another major change in the food service industry. Fast food restaurants offered quick and affordable meals that were perfect for busy people on the go. The popularity of fast food restaurants led to a decline in the number of traditional sit-down restaurants.
3. Globalization. The globalization of the food service industry in the 20th century led to a greater variety of food options available to consumers. Restaurants began to offer dishes from all over the world, and people were able to experience new and different flavors. The globalization of the food service industry also led to a greater appreciation of different cultures and cuisines.