Nobody really answered your question about the meaning of KOM. It comes from pro racing, specifically the 3 week grand tours in France, Italy and Spain. The rider with enough accumulated points for arriving in the top three at mountain top finish lines mid-way in races gets to wear the KOM jersey and upon the finish is awarded the KOM trophy and prize money. Times up the especially hard climbs used regularly (the routes of the grand tours change every year but some segments get used a lot) get recorded and breaking those times is considered a big deal.

The current possessor of the KOM points get to ride that day's stage wearing the KOM jersey, For the Tour de France, that jersey is the famous polka-dot jersey, that pattern being the trademark of the French newspaper that first sponsored the KOM over 100 years ago.

Ben