Acronym Soup: OTOOH ?

Questions

libya is the only country in the world with a solid, single-colored flag, what color is it?

licking what uses one tenth of a calorie?

what major does david bowie's 'space oddity' refer to?

in 'the simpsons', sideshow bob's criminal number is the same as what character in 'les miserables'?

like fingerprints, what other print is individual?