Laziness seems to initiate many changes in our language, however, do we accept the change or do we become complacent? Are we accepting of the change or should we be correct? If not correct how do we proceed? Anyway, I think Zero should be zero and 'oh' should be 'oh'. As simple as the words themselves are is as they should remain. Thank you for your varied and knowledgeable input. Still contravivulatedly yours, Olly.