The difference is that in retailing, they're using a very simple, physically flat bit of circuitry that's put into clothes and other items, and which is then energized and detected by a transmitter.

NPR: The Marketplace Report: U.K.'s Car Tracking System

The main difference being that the more traditional model, featuring pro-rata allocation and collection of payment for order flow, is more geared towards one facet of the investing community, comprised in large part by retail investors who are using options limit orders and other very simple strategies.

FORBES: Examining The Options Flash

In 1984, I developed a very simple method to speed computers up by over 10, 000 times using existing technology.

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