H0 scale (H + number zero), often also written HO scale (H + letter O), is the most popular scale of model railway in most of the world (outside the United Kingdom, where the slightly larger 00 gauge is more common).
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There’s 11 types of Ho’s out there: I’ve met them all but had only about 6 of them.

1.The Undercover Ho
2.The Church Ho
3.High Class Ho
4.Old Ho
5.Nasty Ho
6.Sneaky Ho
7.Bourgeios Ho
8.Project Ho
9.Stupid Ho
10.Crazy Ho
11. The Stank Ho