2. The system as defined in claim 1 wherein the top frame comprises a 4.times.2 dot-position array.
2. The system as defined in claim 1 wherein the top frame comprises a 4.times.2 dot-position array. 3. The system as defined in claim 2 wherein the first three rows of the 4.times.2 dot-position array present a standard Braille code for the character.