Jeez!
Sometimes your proud ignorance astonishes me.....the internet does NOT replace port of call for Trade, you simpleton. If you actually got your head out of Limbaugh's ass (or whatever right wing toilet you're in), you'd have READ CAREFULLY AND COMPREHENSIVELY HOW THE LINK SHOWS THE EVOLUTION TO TODAY'S SYSTEM!
The owners of the stock exchange could have electronically relocate anytime they wanted to in the last 25 years or more. They choose NOT to. The reasons why are obvious to the objective, rational reader. Pity you don't fit into that category. Carry on.