Imperial Trade Classifications

Agricultural (Ag):  Producer of foodstuffs. Earthlike terrestrial 
	world, with Thin to Very Dense Atmosphere (0.43-2.49 atm), 
	Surface Water 35-84%, and Population 100,000-99,999,999 (PR 
	5-7).
Asteroid Belt (As):  Many small worldlets, in place of a single world.
	Rockball planetoids, with diameters less than 124 miles.
Barren World (Ba):  No population (PR 0), government, or law (CR 0).
Desert World (De):  No water.  A Desert world has Very Thin or greater 
	Atmosphere ( > 0.09 atm) and Surface Water 4% or less.
Fluid Oceans (Fl):  Oceans composed of fluids other that water.  A
	Greenhouse or Hostile world, with an Exotic or Corrosive 
	Atmosphere and Surface "Water" 5% or more.
High Population (Hi):  Population of one billion or more (PR 9+).
Ice-Capped (Ic):  Hydrographics contained in polar ice caps.  An Icy
	Rockball world, with a Trace Atmosphere or less ( < 0.10 atm) 
	and Surface "Water" 5% or more.
Industrial (In):  Heavy industry forms a major part of local 
	production.  Trace or less ( < 0.10 atm) or Polluted 
	Atmosphere, and a Population of one billion or more (PR 9+).
Low Population (Lo):  Population less that 10,000 (PR 3-).
Non-Agricultural (Na):  Dependent on synthetic food production.  Very
	Thin Atmosphere or less ( < 0.43 atm), Surface Water less than
	35%, Population of one million or more (PR 6+).
Non-Industrial (Ni):  Population less than 10,000,000 (PR 6-).
Poor (Po):  Low grade living conditions.  Very Thin or Thin Atmosphere
	(0.10-0.80 atm) and Surface Water less than 35%.
Rich (Ri):  High grade living conditions.  Earthlike terrestrial world,
	with Standard to Very Dense, unPolluted Atmosphere (0.81-2.49 
	atm), Population of 1,000,000 to 999,999,999 (PR 6-8), and a 
	moderate to high level of government organization (CR 2-5).
Vacuum World (Va):  No atmosphere ( < 0.001 atm).
Water World (Wa):  Entire world surface ( > 94%) covered by water.