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37 sub-hierarchies and 57 newsgroupsSub-Hierarchies and Groups
antiques
1 groups
aquaria
2 groups
arts
72 groups
ats
1 groups
audio
7 groups
auto
3 groups
autos
11 groups
aviation
13 groups
bicycles
7 groups
boats
1 groups
collecting
1 groups
comics
1 groups
crafts
6 groups
drugs
2 groups
food
8 groups
foods
2 groups
gambling
1 groups
games
74 groups
ham-radio
2 groups
hamradio
1 groups
humor
4 groups
mag
2 groups
models
4 groups
motorcycles
3 groups
music
52 groups
org
2 groups
outdoor
1 groups
outdoors
2 groups
pets
6 groups
photo
2 groups
puzzles
1 groups
radio
12 groups
railroads
1 groups
sf
1 groups
sport
34 groups
travel
4 groups
video
7 groups