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by lxgr 775 days ago
Fortunately we have not just one but two competing band designators – IEEE (widely in use in e.g. satellite communication; L-band, Ku-band, Ka-band etc. come from that nomenclature) and EU/NATO (which seems somewhat obsolete) :)

In addition to that, hams (in study materials and exams) use wavelengths, which is always "fun" to convert from/to frequencies.