All of the following are types of brake-related technology except for which one?

Anti-Skid Brakes (ASB) is not a specific type of brake system, whereas the other options are distinct kinds of brake technologies. Drum brakes and disc brakes are traditional mechanical braking systems found in most vehicles. They function through different mechanisms: drum brakes use a set of shoes that expand against a drum, while disc brakes use pads that clamp down on a disc to create friction.

The dual master cylinder is a component of hydraulic brake systems that enhances safety by allowing for a backup if one circuit fails. It is essential for the functionality and reliability of modern braking systems but is not a type of brake itself. Anti-Skid Brakes, while a feature aimed at preventing wheel lockup during hard braking, are typically considered under the broader category of anti-lock braking systems (ABS) rather than a standalone type of brake technology. Hence, it does not fit the same category as the others.