Vendor needs to provide global distribution system. Availability for future modifications for customization as required, of a Global distribution system (GDS) to schedule, make hotel reservations and secure flight itineraries/tickets through a direct connectivity reservation system, is a critical process. The GDS must have ability to select seating in order to address in a fluid and timely (up to the minute) manner, all threats, new and old. The computer software reservation system must provide a full range of travel services necessary to support the government throughout multiple facilities. The GDS connection must provide a secure connection from the Government’s networks and facilities to the contractor networks housing the GDS service. The GDS desktop software shall provide a user interface through which government personnel can interact with the services provided by the GDS service. The Government has external software systems that interface directly with GDS capabilities. These external systems currently include custom internal software applications as well as the COTS application. This service shall be provided through a transaction processing facility housed at the contractor’s facilities and networks.