Had? Baudot is alive and well on the HF bands.
Yeah, but does anyone still use the Gauss-Weber Telegraph Alphabet? [1]
1. http://www.randomtechnicalstuff.blogspot.com.au/2009/05/unic...
1. http://www.randomtechnicalstuff.blogspot.com.au/2009/05/unic...
Had the advantage that an open carrier (all zeros) mapped to NULL so you didn't waste paper (either tape or roll).