International Securities Exchange - ISE

What Does International Securities Exchange - ISE Mean?
An electronic options exchange that was launched in 2000. The exchange provides investors with greater liquidity and the ability to execute transactions at a much faster rate than the open-cry trading floor that has historically been the basis for options trading. In addition to being an options exchange, the ISE is also a publicly traded company.

Investopedia explains International Securities Exchange - ISE
The advent of the electronic options exchange was considered revolutionary. Computerized trading has proved extremely efficient, and has added to the liquidity in the options markets. This added liquidity has helped to reduce pricing volatility. Prior to electronic trading, investors looking to purchase or sell options relied solely on floor brokers to execute their trades.