Give the meaning of the following terms used in the hospitality industry. (a) Check-in; (b) Reservation; (c) Forecast; (d) Walk-in.

(a) Check-in: This refers to the process of arriving at a hotel or any other hospitality establishment and registering as a guest. During check-in, the guest provides personal information such as name, address, and payment details, and is given a room key or access card. (b) Reservation: This refers to the process of reserving or booking a room, table, or any other service in advance at a hospitality establishment. A reservation is usually made by providing personal information and payment details, and ensures that a guest has a guaranteed spot at the establishment. (c) Forecast: This refers to the process of predicting future demand for products or services in the hospitality industry. A forecast takes into account past trends, current market conditions, and upcoming events to estimate the number of guests or amount of business expected in the future. (d) Walk-in: This refers to a guest who arrives at a hospitality establishment without a prior reservation. Walk-ins may or may not be accommodated, depending on availability and other factors such as peak season and demand.