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1971 – IRS allows cost of TTYs and related equipment as tax deduction; first national conference of TDI agents at Gallaudet College: TTY becomes tool of legislative advocacy
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1972 – 2,500 TTYs installed throughout United States
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Homes
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Rehabilitation centers
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Transportation authorities
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Libraries
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Police, fire, and emergency call centers
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1973 – Rehabilitation Act passes
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New efforts to produce lighter weight, quieter, portable TTYs - $600-$1,000