[SigmundA]

My grandfather was an early HAM radio operator and TV engineer, my dad still has some of his old equipment and the tuning dials are in cycles rather hertz, I grew up hearing him say kilocycle and megacycle.

[Gordonjcp]

I still use megacycles in some contexts, mostly because of using my dad's old 1940s-era radio equipment when I was a teenager.

It's crazy to think that his Panda PR-120V was about the same age then as my early-80s Trio TS520 is now.