I'm a ham radio operator, and I spend all of my time on HF frequencies, which is considered 'shortwave'. shortwave actually refers to the length of the electromagnetic length of the radio wave.
Broadcast AM stations transmitting on say, 650 KHZ, has a full wave length of 1513 feet, whereas, the full wave length of a amateur station operating on a frequency of 14.3 MHZ would be 68 feet, thus the term 'shortwave'.
I wonder if there are any other hams on this forum? QRZ?