Discusses how Morse code isn't very clear without the third (usually) unseen element, the space.
Is there a (historical?) human-optimised (vs. say, ascii or something) binary (on vs. off) code for transmitting information?
After sleeping on it, I recall one code used by Vietnam-era POWs, based on a 5x5 grid reference, optimised for decoding/learning (alphabetical order) vs. optimised for use. But, I'm not sure that it didn't also use spaces.
From history/pre-computer: ie: I don't really want to hear ASCII, or machine language - very few people (excludng Seymour Cray) can do that in their head.
Human-optimized: something that's designed around human/language foibles, ie: Morse is intended to have the fewest keys for the most used characters.
History has decided this is not a history question:
T.E.D. suggests smoke signals, but uses an example in which both the question, and the answers are pre-known:
There's the smoke signal that the Vatican Council uses to communicate when they are voting. Black smoke means they haven't elected a new Pope yet, and white smoke means they have. I'd imagine a lot of other smoke signal systems can be thought of a binary communications as well, as the medium has many similarities to telegraph.
However, smoke signals in general sound intriguing. Does anyone have any references? Wikipedia mentions "Polybius square" which was the basis for the POW communication mentioned above. Knock or tap codes are another name for them.
Thanks T.E.D. for indirectly pointing me to a place (Thanks Wikipedia) to find the name(s) for one answer to the question.
March Ho suggests:
http://en.wikipedia.org/wiki/Braille , in its various language formats, is
a binary human-optimised code. http://en.wikipedia.org/wiki/Night_writing
, Braille's precursor, also fits your description request. Both codes are
fixed-length, and therefore do not suffer from the problem as quoted in