You may want to refer to the following external GDS guides for each GDS that Deem supports. These GDS guides were created by the respective GDS systems, not Deem.

Deem has provided format comparison guides in case you are more familiar with one GDS and prefer the comparison format. 

External GDS Guides

• Sabre Quick Reference Guide

• Amadeus Quick Reference Guide

• Apollo Quick Reference Guide

• Worldspan Quick Reference Guide

Deem Comparison Guides

• Sabre vs Apollo Comparison Guide

• Worldspan vs Amadeus Comparison Guide

• Apollo vs Worldspan Comparison Guide