I won't describe all the serial protocols, but I'd like to talk about some important ones, and sort them into families.
I give you one of the oldest Serial protocols: the Morse code telegraphy protocol. Telecommunications operators have been using this one since the second half of the 19th century.
I have to say that Samuel F. B. Morse was not only an inventor but also an accomplished artist and painter. It is important to mention this here because I'm really convinced that art and technology are finally one and the same thing that we used to see with two different points of view. I could quote more artist/inventor persons but I guess it would be a bit off topic.
By sending long ...