Pittsburgh City Hall, Mayor's Office.
An electronic screen on the wall displayed a real-time stream of data—the internal settlement system of the Pennsylvania Industry Alliance Trust.
The data stream flickered across the screen, each line of green numbers representing a transaction completed between the cities of the Industrial Revival Alliance.
Specialty steel from Erie was loaded onto a train, headed for a construction site in Pittsburgh's South District.
In exchange, a Pittsburgh engineering machinery rental company sent ten excavators to a mine restoration site in Scranton.
A cement plant in Scranton then sent two thousand tons of high-grade cement to Johnston.
In this closed-loop system, the US Dollar was merely a unit of account, no longer a necessary medium of exchange.
A credit-based electronic note circulated among these cities.
