Who invented the electronic ticket?

The electronic ticket, or e-ticket for short, was invented and given its name by inventor Andre Gray when he began selling tickets for a concert through his internet usenet group in June of 1991. The concert,which was headlined by rock group King's X and had The Eric Gales Band as an opening act, was held on July 13th,1991 at the Elco Theatre in Elkhart,Indiana. With a total of twenty seven tickets being sold electronically through the Internet, this was the first verifiable event of where the Words "electronic tickets" were used and where the tickets were actually "paperless" and delivered to customers electronically. Since then, every industry in the world has adopted the e-ticket (where applicable) with very little or no changes from the original template as set forth by Gray, especially the airline industry.