Six principal systems of embossed type: Haüy, Gall, Howe, Moon, Braille, Wait
A tactile alphabet is a system for writing material that the blind can read by touch. While currently the Braille system is the most popular and some materials have been prepared in Moon type, historically there have been a large number of other tactile alphabets:
- Systems based on embossed Roman letters:
- Valentin Haüy's system (in italic style)
- James Gall's "triangular alphabet," using both capital and lower-case, which was used in 1826 in the first embossed books published in English
- Edmund Frye's system (capital letters only)
- John Alston's system (capital letters only)
- Jacob Snider, Jr.'s system, using rounded letters similar to Haüy's system, which was used in a publication of the Gospel of Mark in 1834, the first embossed book in the United States.
- Samuel Gridley Howe's Boston Line using lowercase angular letters, influenced by Gall's system but more closely resembling standard Roman letters
- Julius Reinhold Friedlander's Philadelphia Line, using all capital letters, similar to Alston's system, used at the Pennsylvania Institution for the Instruction of the Blind in Philadelphia, Pennsylvania
- William Chapin (also at the Pennsylvania Institution)'s system, combining the lowercase letters of the Boston Line with the capitals of the Philadelphia Line, forming the "combined system" (used by 1868 in books printed by N. B. Kneass, Jr.)
- Systems based on arbitrary symbols:
