A Computer Reservation System (CRS) is a digital platform that stores, retrieves, and facilitates the booking of services like flights, hotels, car rentals, and other travel-related activities. Initially developed by airlines, CRS technology has expanded to serve travel agencies and other tourism providers, enabling centralized management and distribution of perishable travel products to a global market through various channels. 
 
Key Functions
  • Inventory Management: 
    Manages the availability and booking of perishable inventory, such as hotel rooms and airline seats, ensuring accurate, real-time updates across different time zones. 
     
  • Information and Distribution: 
    Provides access to schedules, fares, and other vital information for a range of travel products, distributing it to customers, travel agents, and other distribution channels. 
     
  • Transaction Processing: 
    Conducts transactions related to reservations and ticket issuance, streamlining the booking process. 
     
  • Data Management: 
    Stores and manages customer and booking data, often including Passenger Name Records (PNRs). 
     
  • Analytics: 
    Offers dashboards with analytics to identify popular services, time slots, and other trends, helping businesses improve their offerings. 
     
Evolution and Modern Use
  • From Airlines to GDS: 
    CRSs were first operated by airlines but later evolved into Global Distribution Systems (GDSs), which now often serve as the central platform for booking multiple types of travel services. 
     
  • Internet Gateways: 
    Major GDSs provide internet gateways and interfaces that allow consumers and agents to access and book travel services. 
     
  • Centralized Platform: 
    CRSs serve as a single, unified platform for managing sales and distribution for a variety of products, from vacation packages to car rentals and activities. 
     
  • Expanded Reach: 
    They connect travel suppliers with a broad customer base across geographic boundaries, eliminating physical and geographical distances.