If you like that, make sure you check out the `definitions.units` file from GNU Units. Many informative and entertaining rants to be found there:

https://fossies.org/linux/units/definitions.units

Am in Sydney, never heard of the supposed Sydharb before now. Olympic swimming pools is very common though. As are the more informal crap-ton and shit-load.

One of the entries is the rack unit, 1.75 inches, or 1U, amusingly.