A tropical cyclone is a storm characterized by a large low pressure system center and numerous thunderstorms that produce strong winds and flooding rain.... on the Saffir-Simpson Hurricane Scale
Saffir-Simpson Hurricane Scale
The Saffir-Simpson Hurricane Scale is a classification used for most Western Hemisphere tropical cyclones that exceed the intensities of tropical depressions and tropical storms, and thereby become hurricanes.... .
A pandemic is an epidemic of infectious disease that spreads through populations across a large region; for instance a continent, or even worldwide.... on the Pandemic Severity Index
Pandemic Severity Index
The Pandemic Severity Index is a proposed classification scale for reporting the severity of influenza pandemics in the United States. The PSI was accompanied by a set of guidelines intended to help communicate appropriate actions for communities to follow in potential pandemic situations....
Category 4 is a description of a cable that consists of four unshielded Twisted pair wires with a data rate of 16 Megabit/s and performance of up to 20 Megahertz....
The upper category for professional fireworks in England
England
native_name =|conventional_long_name = England|common_name = England|image_flag = Flag of England.svg|image_coat = England COA.svg|symbol_type = Royal Coat of Arms...
