It's a fairly common notation on printed circuit board resistors where a dot could get lost. Better readability. They usually drop the suffix though, not sure if it's common for non-resistance items to use, but I got what he was trying to say.

A similar shorthand exists for calendar years - e.g. "2k8" means "2008".

which is clearly different to 2k8 meaning 2800. (or 1k7 meaning either 1700 or 1007...)