>Historically, unix systems have, for the most part, used
	>single_case_underscore_separated_identifiers, not
	>MixedCaseMashedTogetherIdentifiers.

	I thought that, historically, Unix has used six character identifiers
	(later seven chars) and no underscores for lack of space.

That hasn't been true for a long, long time, if it ever was.  Take a 
look at the v6 kernel source in the Lions book; you'll see identifiers
as long as 13 characters, as well as underscores (though they did tend to
use underscores more sparingly than the UCB people later would).

The argument for single case identifiers has overwhelming historical
precedent.

--Mirian