Does it really makes that much differnce the number of
bits for a char?
In the 1960s, when all these ideas started to solidify, yes. For a
typical big bank batch job - one that occurs every night - the
difference was enough to justify careful planning. When the disk took
over from the tape for everyday data storage in the 1960s, those extra
bits here and there added up as wasted space on very expensive packs.
--
Will