In Canada we are allowed to use power poles that are cord ended. Wiremold for example has this as an option for Canada only in their cut-sheet.

I saw a lot more of them in the 80's when computer terminals were first going on desks.

They were used to bring both power and coax to everybody's IBM 3270 crt.

Now that most people are in a cube farm everything is hardwired as part of the furniture package.