Early sound based systems were used primarily for large weapons.

Tin based systems are not the only ones used, although the most popular.

This is much more difficult to jam than the radio based system.

A value based system being more accurate and less complicated.

Many computer based systems work together to account for and to improve the quality of mill products.

We see the system described here as being complementary to emergency room based systems.

The newer water based systems are much more resistant to this type of test.

Currency based systems offer maximum freedom for individual players over the course of their current game.

Magnetic storms have serious effects as with any radio based system.

It was one of the first smart card based systems to be compromised.