nuhallid

I'm new to geocaching but use GPS and GIS extensively at work. I use d/m/s in all my GPS units. I notice that most of the geocache sites in my area are listed using d/m.m. Any particular reason? My newest unit doesn/t (or maybe I haven't figured out how, yet) convert to d/m.m. It's no big deal to do it manually, but is there some reason for using that format instead of d/m/s?