Top 10 group matches for this tag:

rec.aviation.piloting (66049 articles)
rec.aviation.military (45772 articles)
alt.binaries.multimedia.aviation (32720 articles)
fr.rec.aviation (27362 articles)
fido7.ru.aviation (15951 articles)
rec.aviation.owning (15013 articles)
rec.aviation.homebuilt (14596 articles)
aus.aviation (14028 articles)
rec.aviation.soaring (13663 articles)
rec.aviation.student (12830 articles)