Categories

The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• HIP objects (3 members)
• Han Dynasty poets (1 member)
• Han Dynasty politicians (1 member)
• Harvard University alumni (1 member)
• Harvard University faculty (1 member)
• Helices (1 member)
• Hellenistic philosophers (1 member)
• Hertzsprung-Russell classifications (1 member)
• History of astronomy (1 member)
• Hydraulic engineering (1 member)
• Hypochondriacs (1 member)
• Hypothetical planetary systems (1 member)
• Incidence geometry (1 member)
• Infinity (1 member)
• Integral membrane proteins (1 member)
• Iowa class battleships (1 member)
• Iridaceae (1 member)
• Jansenists (1 member)
• Jewish philosophers (1 member)
• Julius Caesar (1 member)
• Jupiter (1 member)
• Jupiter Trojans (1 member)
• Korean War battleships of the United States (1 member)
• Kuiper belt objects (1 member)
• Lambda Boötis stars (1 member)
• Latin squares (1 member)
• Let's Make a Deal (1 member)
• Literary theory (1 member)
• Living people (1 member)
• Lyra constellation (1 member)
• M-type main sequence stars (2 members)
• Main sequence stars (1 member)
• Makemake (1 member)
• Mars (1 member)
• Mathematical analysts (1 member)
• Mathematical problems (1 member)
• Mathematical series (1 member)
• Mathematical structures (1 member)
• Mathematical theorems (1 member)
• Mathematics paradoxes (2 members)
• Mechanical engineers (1 member)
• Medicinal chemistry (1 member)
• Medicinal plants (1 member)
• Members of the Prussian Academy of Sciences (1 member)
• Members of the Royal Swedish Academy of Sciences (1 member)
• Members of the Russian Academy of Sciences (1 member)
• Metabolism (3 members)
• Metaphysicians (1 member)
• Meteorological instrumentation and equipment (1 member)
• Microeconomics (1 member)