First Fully Electronic Stock Exchange

In the context of global equity markets, stock exchanges play a critical role in facilitating the buying and selling of securities. Some exchanges are physical locations where trading occurs, while others operate entirely in a digital environment. Consider the following stock exchanges and their unique characteristics:

The New York Stock Exchange (NYSE) is known for its traditional open outcry system, where brokers engage in face-to-face interaction. Conversely, the NASDAQ operates a fully electronic marketplace and is known for listing a significant number of technology companies.

Given this background, which of the following stock exchanges was the first to adopt a fully electronic trading system?