Different types of hurricane protection were proposed to protect the southern Louisiana region.

Two types of mechanisms have been proposed for Triton's capture.

Three different types of criteria for ambiguity will be proposed.

This type of project was initially proposed in 1980 again in 1997, 2006 and 2009.

Various new types of mental disorder diagnosis are occasionally proposed.

At the moment, two different type of mechanisms have been proposed.

A new type of spacecraft that lacks any propellant is also being proposed.

Three types of mollusks have been proposed as the lost khillazon.

Both types were proposed for use in Ulster during the 1980s as patrol vehicles.

Some types of taxes have been proposed but not actually adopted in any major jurisdiction.