| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Voice-production device | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Drawing/Writing communication assistive device | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Telephoning/Telematic device | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Audiovisual device | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Face-to-face communication assistive device | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Reading assistive device | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Bed occupancy alarm, battery-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Chair occupancy alarm, battery-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Personal emergency response system | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Personal fall alarm | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Insulin alarm | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Audio amplifier | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Voice amplification system | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Auditory training system | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens radius gauge | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Laptop computer | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Palmtop computer | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Compact-disk computer drive | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Floppy-diskette computer drive | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Hard-disk-station computer drive | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Optical-disk-station computer drive | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Computer roller ball | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens case | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens thermal cleaner, line-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle frame | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Fresnel lens | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle lens, prescription, custom-made | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Tinted spectacle lens, prescription, custom-made | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Pillow speaker | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Loupe | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Magnifying bar reader | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Magnifying prism reader | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Assistive reading device, video | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacles | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Recumbent spectacles | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Abacus | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Bed/chair occupancy alarm sensor | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Moisture chamber spectacles | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Voice synthesizer/digitizer | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Rigid contact lens inserter/remover | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Magnifying spectacles | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Hand-held telescope | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Fresnel prism | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Tinted spectacles, non-prescription | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Soft contact lens inserter/remover | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Moisture chamber goggles | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Soft contact lens remover | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Chair occupancy alarm, line-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Bed occupancy alarm, line-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Sound pillow | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens care kit | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle-mounted telescope | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens thermal cleaner, battery-powered | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens agitation cleaning system, ultrasonic | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens agitation cleaning system, mechanical | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle lens, prescription, standard | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle lens, pre-prescription | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Tinted spectacle lens, non-prescription | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Tinted spectacle lens, prescription, standard | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Spectacle-mounted magnifier | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Hard corrective contact lens | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Rigid-gas-permeable corrective contact lens, daily-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Soft corrective contact lens, daily-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Soft corrective contact lens, extended-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Soft corrective contact lens, daily-disposable | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Antimicrobial soft corrective contact lens, daily-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Antimicrobial soft corrective contact lens, extended-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Antimicrobial soft corrective contact lens, daily-disposable | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Visible-light-filtering corrective contact lens | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Decorative contact lens, daily-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Decorative contact lens, extended-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Decorative contact lens, daily-disposable | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Rigid-gas-permeable corrective contact lens, extended-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Color discrimination soft corrective contact lens, daily-wear | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Color discrimination spectacle lens, prescription, custom-made | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Braille computer keyboard | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Retinal prosthesis system radio-frequency coil | Is a | False | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Visual-image telephoning facilitator | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Hearing aid enhanced audio device, teaching-environment | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  | 
| Communication board | Is a | True | Communication and information assistive device | Inferred relationship | Existential restriction modifier |  |