- Allen, Robin PhD
 - Silver Spring - Provides behavioural specialist services and products for children, adolescents, and adults with developmental disabilities. - Deafology 101
- Silver Spring - Crazy, crash course on deaf culture by Ken Glickman, a.k.a. Prof. Glick.
- Institute For Disabilities Research and Training, Inc. (IRDT)
- Silver Spring - Consulting to organisations serving people with disabilities including closed caption research and 911 TDD training for the deaf community.
- NFSS Communications
- Silver Spring - Supplier of assistive living devices for the deaf and hard of hearing.
- Spectrum Center
- Bethesda - Tomatis auditory training as a sensory stimulation therapy service for children, adolescents, and adults.
- Law Firms@
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