This made me smile, but I looked it up anyway and it turns out it's a non-SI abbreviation for kilometres per hour. https://en.m.wiktionary.org/wiki/kmph https:

This made me smile, but I looked it up anyway and it turns out it's a non-SI abbreviation for kilometres per hour. https://en.m.wiktionary.org/wiki/kmph https://en.m.wiktionary.org/wiki/kmph Not common in my country, the UK, but maybe in India? I know the Indian language numbering system has different number groupings, so why not.