why, in 2014, people in the industry are still using green screen interfaces
Two MeFites (update: three!) who have worked on airline systems explain why the computer reservation system that airlines use seems so slow and outdated.
Changing even one character on a green screen could break dozens or hundreds of third party applications. It was like cement; it would take months of negotiation to orchestrate the change in layout on a green screen if you wanted to, say, make a field one character wider.