Finding a cheap hotel is important to budget travellers, whether for an Hawaiian honeymoon, adventure travel in the mountains, or for business. Airline Reservations Systems contain airline schedules, fare tariffs, passenger reservations and ticket records. An airline's direct distribution works within their own reservation system, as well as pushing out information to the GDS. A second type of direct distribution channel are consumers who use the internet or mobile applications to make their own reservations. Travel agencies and other indirect distribution channels access the same GDS as those accessed by the airlines' reservation systems, and all messaging is transmitted by a standardized messaging system that functions on two types of messaging that transmit on SITA's HLN. These message types are called Type A for remarks-like communications and Type B for secured information. This book contains advanced information about this subject. This book will be a boost for the learners and an essential subject manual. Designing of the book is such that the students will be benefited as far as the their knowledge and examination is concerned. CONTENTS: Rail Transport Reservation; Computerised Passenger Reservation System; Banquet Reservation; Air Travel Reservation; Reservation Process at Airport; Documentation Systems in Reservation.