Thanks for your feedback . > Why you want to give simple but misleading name? I suppose the only reason is because of examples like this: >> File.binread('picture.jpg').encoding => #<Encoding:ASCII-8BIT> (there's not much ASCII about most of those jpeg bits, so, for me, the encoding name assigned it is a bit misleading). > I want developers to read document when they meet ASCII-8BIT. So you want developers to realize that they can grep it "as if" ASCII, correct? That is a good idea. Maybe something like the name ASCII-8BIT-COMPATIBLE would satisfy both? Thanks. -r=