The Green Screens Powering Our World

Although they debuted in 1971, IBM 3270 green screen terminals remain a hidden engine of the modern economy. These block-oriented systems still process many of the world's bank transactions and airline reservations today.

While modern users expect sleek touch interfaces, these vintage terminals rely on high-speed data streams to communicate with massive mainframes. By sending large chunks of information at once, they drastically reduce the computing strain on the host system. This efficiency is why they survived the transition into the digital age. You have likely interacted with a system running this technology without ever realizing it was behind the curtain.