I haven't kept it up and don't remember the details clearly, but I could read about one digit per second when I originally learned to read them. Of course, bar

I haven't kept it up and don't remember the details clearly, but I could read about one digit per second when I originally learned to read them. Of course, bar codes keep scaling up in difficulty and complexity with interlacing and error correction so it's very easy to imagine that you wouldn't be able to decode some in your head at all.