Original sentence: For H0 and 0 scales, NEM uses the number zero, and NMRA uses letter "O" (HO instead of H0).e = narrow gauge ().i = industrial ().m = metre gauge ().no letter = standard gauge ().p = park railway ({convert|300|-|400|mm|in|1|abbr=on|disp=or}})
Edited sentence: For H0 and 0 scales, NEM uses the number zero, whereas NMRA uses letter "O" (HO instead of H0).e = narrow gauge (prototype: ).i = industrial (prototype: ).m = metre gauge (prototype: ).no letter = standard gauge (prototype: ).p = park railway (prototype: )