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Six principal systems of embossed type in use ca. 1900: 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:
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.)
Elia Chepaitis's ELIA Frame tactile alphabet/font system includes the major characteristics of the Roman alphabet letter within a frame. The frame denotes where the letter begins and ends and allows for systematic exploration. The use of the Roman alphabet's features in the design helps previously sighted people learn it. And its similarities to standard Roman fonts helps sighted caregivers to learn and share the alphabet with people who have a visual impairment.
Constance Frederica Gordon Cumming. Work for the blind in China. Printed by Gilbert & Rivington, Limited, St. John's House, Clerkenwell, E.C.: Gilbert & Rivington, Ld. p. 79. Retrieved 23 April 2012.[Original from Columbia University Digitized Aug 18, 2009][GILBERT AND RIVINGTON, LD., ST JOHN'S HOUSE, CLERKENWELL ROAD, LONDON, E.C.]