Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications. wikipedia.org

Google Calendar is a free time-management web application offered by Google. wikipedia.org

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. wikipedia.org

Travel is the movement of people between relatively distant geographical locations, and can involve travel by foot, bicycle, automobile, train, boat, airplane, or other means, with or without luggage, and can be one way or round trip.

The Sabre Global Distribution System (GDS) enables companies to search, price, book, and ticket travel services provided by airlines, hotels, car rental companies, rail providers and tour operators. wikipedia.org

Customer service is the provision of service to customers before, during and after a purchase. wikipedia.org

Amadeus IT Group is a transaction processor for the global travel and tourism industry. Acting as an international network, Amadeus provides search, pricing, booking, ticketing and other processing services in real-time to travel providers and travel agencies through its distribution business area. wikipedia.org

Office administration is a set of day-to-day activities related to financial planning, billing and recordkeeping, personnel, and physical distribution and logistics, within an organization. wikipedia.org