Glossary Posted On:
The Family Center on Technology and Disability


Abbreviation Expansion Software: Abbreviation expansion software is used to help individuals become more efficient writers. This software will automatically expand words or phrases based on pre-programmed commands that have been entered by the user. An example of an abbreviation used is first and last initials will be expanded into a name. The abbreviation expansion software allows the user to minimize the number of keystrokes necessary to produce a written piece. It is often combined with word prediction programs or specialized keyboard assistance programs.

Accessibility Features: Accessibility features are various options that exist within products that allow a user to adjust the settings to their personal needs. Products can come with various accessibility features that can adjust to the individual’s visual, mobility, hearing, language, and learning needs. Accessibility features allow individuals with disabilities to use products that may not other wise be useful. They also serve as a piece of assistive technology because adjustments are being made to help the individual.

Accommodations: In the context of education, an accommodation is a change in the format or presentation of educational materials so that a student with a disability can complete the same assignment as other students. Accommodations can also include changes in setting, timing, scheduling, and/or response mechanisms. Students who receive accommodations may be allowed to: listen to audio versions of textbooks, record classroom lessons, use calculators, submit a drawn picture of key concepts rather than a written report, and work with a “study buddy” or notetaker. There are dozens of accommodations that can change a student’s experience from frustration to success if teachers, aides, and parents are creative.

Activities of Daily Living: Frequently used in national surveys as a way to measure self-care activities, ADLs include basic tasks such as eating, bathing, dressing, toileting, getting in and out of a chair or bed, and getting around at home. National surveys also measure another level of self-care – Instrumental Activities of Daily of Living (IADLs) – which include household chores, meal preparation, business activities, shopping, telephone use and mobility outside the home.

Adapted Technology: "An adaptation is a modification made to a device or to a service or program which renders it usable by or appropriate for a person with a disability. At school, a standard curriculum or lesson may be adapted, for example, to better meet the needs of a special education student. A car may be adapted with hand controls, so a person whose legs are impaired may drive. A computer may be adapted, so a person who has no fine motor control can use the machine. A toy may be adapted so a child with a disability can enjoy and learn from its use. A device, program or service which has been modified is referred to as "adapted." Thus, we have adapted computers, adapted cars, adapted kitchens, adapted toys and games, etc. Source: Equal Access to Software and Information:

Aids for Daily Living: Another category of assistive technology, these self-help aids help people with disabilities eat, bathe, cook and dress. A “low tech” example would be a fingernail brush with two suction cups attached to the bottom that could stick onto a flat surface in the bathroom. Such an ADL would allow a child with limited mobility to clean her nails without having to grip the brush. There are also “high tech” ADLS, many of which contain computerized components.

Alternative Access/Input Device: An alternative access/input device allows individuals to control their computers using tools other than a standard keyboard or pointing device. Examples include alternative keyboards, electronic pointing devices, sip-and-puff systems, wands and sticks, joysticks, and trackballs.

Alternative Keyboard:
Alternative keyboards may be different from standard keyboards in size, shape, layout, or function. They offer individuals with special needs greater efficiency, control, and comfort. For example, a traditional QWERTY keyboard may be confusing to a child with a developmental disability and can be replaced with a keyboard that lists letters A-Z in big, bold letters and doesn’t contain a lot of “extra” keys. This makes focusing on spelling and typing words a lot easier. Ambulation Aids: These devices help people walk upright and include canes, crutches, and walkers.

Americans with Disabilities Act: The Americans with Disabilities Act of 1990 (ADA) prohibits employers from discriminating against people with disabilities and makes such discrimination a civil rights violation. Providers of public services, schools, public buildings and public transportation services also must provide accessibility to people with disabilities.

Architectural Adaptations: Architectural adaptations are physical changes in the home, school, workplace, or other area. Adaptations that remove or reduce physical barriers include ramps, lifts, lighting, altered counter top heights and widened door frames.

Assistive Listening Device (ALD): Assistive listening devices (ALDs) are used to aid individuals with hearing impairments to hear more clearly in public situations. The system can be set up to amplify things such as televisions, radios, doorbells, and PA systems. ALDs can be used with or without hearing aids.

Assistive Technology Device: An assistive technology (AT) device includes any item, piece of equipment, or product system that is used to increase, maintain, or improve the functioning of individuals with disabilities. It may be purchased commercially off the shelf, modified, or customized. The term does not include a medical device that is surgically implanted, or the replacement of such a device. AT devices range from low tech, such as a magnifying glass to high tech, such as a computer that responds to touch and allows a child to communicate more effectively.

Assistive Technology Evaluation:
This functional evaluation of a child in his/her customary environment focuses specifically on the child’s need for assistive technology. While it is conducted by a team of professional evaluators, input from family members and other knowledgeable personnel is sought in order to identify the child’s strengths and challenges. Some people use the terms “assessment” and “evaluation” interchangeably, while others use “assessment” to refer to the process that takes place before a child receives an AT device, and “evaluation” to refer to the process (and resulting document) that studies how well the device has worked for the child.

Assistive Technology Interventions: Assistive Technology intervention refers to the use of various types of technology in order make things more accessible to individuals with disabilities as well as help them with various academic tasks. AT interventions can be used to help students access reading, writing, math, and other instructional curriculum.

Assistive Technology Service: An assistive technology service is one that directly assists in the selection, buying, designing, fitting, customizing, maintaining, repairing, replacing, and coordinating of assistive technology devices. It also includes the training of students, teachers, therapists and family members on the use and maintenance of the device.

Augmentative and Alternative Communication (AAC) System: An AAC system is one that increases or improves the communication abilities of individuals with receptive or expressive communication impairments. The system can include sign language, graphical symbol systems, synthesized speech, dedicated communication devices, and computer applications. AAC technology spans a wide range of products, from low-tech picture boards to high-tech speech recognition programs.

Auxiliary Aids and Services: Under the Americans With Disabilities Act, professionals and organizations must communicate as effectively with people with disabilities as they do with others. Auxiliary aids and services assist in this effort. Auxiliary aids may include taped texts, interpreters or other effective methods of making materials usually delivered orally available to students with hearing impairments; readers in libraries for students with visual impairments; classroom equipment adapted for use by students with manual impairments; and other similar services and actions. 


Battery Interrupter: A battery interrupter allows a user to modify battery-operated devices for switch input. It is placed between the battery and its connection point in the battery compartment. The compartment is notched to allow the cord to pass through when closed. The device is left in its ON position, with the switch plugged into the input jack of the battery interrupter. Braille: This raised dot printed language is used by many people with visual impairments. Each raised dot arrangement represents a letter or word combination. A great deal of information about Braille is available through the National Federation for the Blind at

Braille Display: A Braille display is a tactile device consisting of a row of special “soft” cells. A soft cell has 6 or 8 pins made of metal or nylon; the pins are controlled electronically and move up and down to display characters as they appear on the display of a computer or Braille note taker. A number of cells are placed next to each other to form a soft or refreshable Braille line. As the pins of each cell pop up and down, they form a line of Braille text that can be read by touch.

Braille Embossers and Translators: A Braille embosser transfers computer-generated text into embossed Braille output. Translation programs convert text that has been either scanned or typed into Braille that can be printed on the embosser.


Captioning: This is a text transcript of the audio portion of multimedia products, such as movies and television programs. Captioning is synchronized with the visual events taking place on screen. In addition to its usefulness for those with hearing impairments, it has been shown to be helpful to students with a range of visual and auditory processing problems. It has also been shown to enhance learning for those without disabilities. 


Descriptive Videos: Descriptive videos are those that have been enhanced with narration that describes the visual elements of action, characters, locations, costumes and sets without interfering with the production’s dialogue or sound effects. They allow individuals with blindness or other vision impairments to enjoy a video in greater depth.

Digitized Speech: Digitized Speech is speech that has been digitally recorded for later play-back. As it is a recording, the quality is good and easy to understand. Digitized speech may be used in CD's for talking stories, in encyclopedias, and in software packages where teachers and students are able to record sounds, words and sentences themselves. Digitized speech has a finite, predetermined vocabulary and so does not offer full access to mainstream software.

Due Process Hearing: Parents and/or guardians may request a due process hearing if they are unable to resolve differences with a school or school system concerning the special education services being provided to their child. A due process hearing is more formal than mediation (see below) and the parties are generally represented by attorneys and/or advocates. An impartial hearing officer hears both sides of the dispute and issues a written decision within 45 calendar days of the hearing request. If either the parents or the school disagree with the decision, they may appeal through the court system.

Durable Medical Equipment (DME): Durable Medical Equipment (DME) is any piece of equipment that is used to serve a medical purpose, can withstand repeated use, and is appropriate for use in the home. It is expected to last for a substantial period of time. Durable medical equipment can include devices, controls, or appliances specified in an individuals plan for medical care. The equipment is used to help increase the individual’s ability to perform various activities of daily living or to communicate with the community in which they live. DME can include items necessary for life support, supplementary supplies and equipment necessary for the proper functioning of such items.

Early Intervention Services: Early intervention services are provided under Part C of the Individuals with Disabilities Education Act (IDEA), which addresses the needs of infants and toddlers with disabilities – from birth to age three – and their families. Services are made available based on a federal grant program which directs states to evaluate the needs of both the child and his or her family and to set measurable outcomes for progress in an Individualized Family Service Plan (IFSP).
Electronic Pointing Devices: These devices allow an individual to control the curser on a computer screen (or other computerized device) using ultrasound, an infrared beam, eye movements, nerve signals, or brain waves. When used with an on-screen keyboard, electronic pointing devices also allow the user to enter text and data.

Environmental Control Unit (ECU): ECUs enable individuals to control electronic devices in their environment through a variety of alternative access methods, such as switch or voice access. ECUs can control lights, televisions, telephones, music players, door openers, security systems, and kitchen appliances. These systems are also referred to as Electronic Aids to Daily Living (EADL).  Eye Gaze Board: An eye gaze board is a clear Plexiglas board that is used as a simple communication device. Pictures are mounted at strategic areas on the board and the user communicates by looking at a selected picture.

Evaluation: Evaluation is both a product and a process. An evaluation is the result of assessment activities in which a team of professionals (e.g., teachers, counselors, and/or service providers) determine whether a child is eligible for early intervention services (birth to three), whether the child has a disability, and what special education and other services s/he might need. 


FAPE: This abbreviation stands for “free and appropriate public education.” It is the term used in the IDEA law, which states that school systems must provide children with disabilities with special education services and accommodations, including AT, at no cost to the parents. The law does not say what is considered an “appropriate” education, but it does refer to the need for children to be taught in the most typical classroom setting possible, often referred to as the “least restrictive environment.”

Functional Vocational Assessment: This is an assessment of a person’s ability and desire to do a job by observing his or her performance on various tasks in a variety of job settings. This type of assessment should record not only the ease or difficulty with which a person is able to complete particular tasks, but also affective information – whether the person appears relaxed and happy while doing the job or unduly stressed and agitated during or after completing the tasks. A functional assessment might also include an individual’s ability to get to and from a job and their ability to get along with co-workers. 



Independent Living Centers (ILCs):
Also known as Centers for Independent Living (CILs), ILCs are typically non-residential, community organizations that advocate for people with disabilities. The centers promote full access to housing, transportation, employment, recreation, and other support services.

Individualized Education Program (IEP): Each public school child who receives special education and related services must have an Individualized Education Program (IEP). The IEP should be a truly individualized document and include such information as present levels of functioning, future goals, and services to be provided. By law, the IEP process must consider the need for assistive technology. If documented in the IEP, schools must provide AT devices and services. The IEP creates an opportunity for teachers, parents, school administrators, related services personnel, and students (when appropriate) to work together to improve educational results for children with disabilities. At age 16, IEPs must contain a statement of services needed for successful transition from high school to a youth’s next environment. (An IEP team may, however, determine that a statement of transition services should be included in a younger child’s IEP.)

Individualized Family Services Plan (IFSP): Like an IEP, an IFSP is a written statement of an infant’s or toddler’s (birth to age three) developmental status, information about his family’s needs and abilities to support his learning and development, and a list of outcomes for the child and the family to achieve. The IFSP describes the services the child will receive, how these will be delivered and how the child will transition to his next environment. The document should identify a service coordinator to work with the family to monitor and achieve the goals established.

Individualized Transition Plan (ITP): The ITP is the portion of a child’s IEP that focuses on the issues associated with his or her transition from high school to higher education, employment, or individual living. The ITP should be as specific as possible, identifying the child’s interests, goals, current educational status, remaining educational needs (such as credit hours), current and projected assistive technology needs, and the steps that need to be taken to help the child move smoothly to post-high school settings.

Infrared Sender/Receiver: This is a device commonly found in an environmental control unit (ECU). An infrared signal is sent to the control unit, which in turn sends a signal to the appliance. These are usually small and portable and vary in size and shape. They can be used in different areas of a room, but the remote must be aimed at the control box, with nothing in its path.


Joysticks: A joystick may be used as an alternate input device. Joysticks that can be plugged into the computer’s mouse port can control the cursor on the screen. Other joysticks plug into game ports and depend on software that is designed to accept joystick control.  KKeyboard Additions: A variety of accessories have been designed to make keyboards more accessible to people with disabilities. Keyguards are hard plastic covers with holes for each key. Someone with an unsteady finger or using a pointing device can avoid striking the wrong key by using a keyguard. Moisture guards are thin sheets of plastic that protect keyboards from spills and saliva. Alternative labels add visual clarity or tactile information to the keys.


Keyboard Emulator:
A keyboard emulator is a device that is connected to or resides in a computer and imitates the computer’s keyboard in function and performance.


Local Transition Councils: LTCs are state interagency councils made up of representatives from the state agencies involved in supporting student transitions within K-12 education and, especially, transitions from secondary school to post-secondary activities.

LRE: The abbreviation LRE stands for “least restrictive environment.” This means that, to the maximum extent possible, children with disabilities are educated with children w ho do not have disabilities. Removal from a general educational classroom occurs only when a student cannot be successfully taught in that setting even with assistive aids and services.


Mediation: In the context of AT, mediation is a process to resolve disagreements between parents and school personnel. It is provided at no cost to the family or the school district. Both parties must agree to mediation. A neutral trained mediator facilitates the meeting to help both parties resolve their disagreements. Mediation is more structured than conciliation but less formal than a due process hearing. The most recent revision of the Individuals with Disabilities Education Act (IDEA) strongly encourages the use of mediation.  Mentoring: Mentoring is a process through which an individual with experience in a certain area provides information and insight to a less experienced person. Mentors can be matched with “mentees” through formal programs or through informal family friendships and connections, or community contacts. Mentors can be valuable sources of inspiration and support to young people. Their focus may be on education, career development, and/or independent living. Mentoring sessions may involve in-person meetings, but may also be based on email and/or telephone communication.

Mobility and Transportation Aids: This category of AT includes products that help mobility-impaired persons move within their environment and give them independence in personal transportation. Products include standing or walking aids, transfer aids, stair lifts, walkers, scooters, wheelchairs and three-wheeled chairs, adapted bikes and tricycles, car seats or beds, stretchers, ramps, strollers, adapted driving controls, vehicle conversions, patient and wheelchair lifts and carriers. 


Online Community Support: Online communities and online support are websites, listservs, chat rooms, and other electronic ways for people to communicate with each other about a topic of mutual interest.

Onscreen Keyboard: Onscreen keyboards are software-generated images of a standard or modified keyboard placed on the computer screen. The keys are selected by a mouse, touch screen, trackball, joystick, switch, or electronic pointing device.

Optical Character Recognition and Scanners: Optical character recognition (OCR) software works with a scanner to convert images from a printed page into a standard computer file. With OCR software, the resulting computer file can be edited. Pictures and photographs do not require OCR software to be manipulated. 


Pointing and Typing Aids: A pointing or typing aid is typically a wand or stick used to strike keys on the keyboard. They are most commonly worn on the head, held in the mouth, strapped to the chin, or held in the hand.

Prosthetic and Orthotics: Prosthetic and orthotics include replacement, substitution or augmentation of missing or malfunctioning body parts with artificial limbs or other orthotic aids. This includes splints, braces, foot orthosis, helmets, restraints, and supports.


Related Services: Related services are any additional support services that a child needs in order to benefit from his or her education. Such services include, but are not limited to: school-related transportation, medical evaluation, parent counseling and training, developmental and corrective services such as speech pathology, psychological services, physical and occupational therapy, recreation and assistive technology. Interpreters, while not specifically on the list, must be provided by the school system if needed for a child to benefit from education services.


Screen Enlargement Programs: Screen enlargement programs magnify a section of a computer screen, increasing visibility for users with limited vision. Most programs have variable magnification levels and some offer text-to-speech options.

Screen Reader: A screen reader is a software program that uses synthesized speech to “speak” graphics and text aloud. This type of program is used by people with limited vision or blindness or with a print disability, such as dyslexia.

Seating and Positioning Aids: Seating and positioning aids offer modifications to wheelchairs or other seating systems. They provide greater body stability, upright posture or reduction of pressure on the skin surface. Equipment includes wheelchair cushions, trunk/head supports, modular seating, and seating lifts.

Speech Recognition Programs: These software applications convert words that are spoken aloud to text. Speech recognition is designed to respond to a wide range of voices, without prior “training” of the software. Voice or speaker recognition, on the other hand, involves the training of a device to recognize a specific individual’s voice. Both speech and voice recognition programs may be used to create written documents without the use of a keyboard, to control specially adapted equipment, and to operate telephone, cell phone and PDA (personal digital assistant) applications.

Switches and Switch Software: Switches offer an alternative method of providing input to a computer when it is not possible to use a standard keyboard or mouse. Switches come in various sizes, shapes, methods of activation and placement options. Some software programs have been developed specifically for use with a switch and can employ on-screen scanning. With on-screen scanning, the computer highlights the options available to the user, who then selects the desired action. When a visual or auditory prompt indicates a specific keyboard or mouse function, the user activates the switch and the desired function occurs. Other programs have built-in options for switch use. 

Supported Employment: According to the U.S. Department of Labor, “Supported employment facilitates competitive work in integrated work settings for individuals with the most severe disabilities (i.e. psychiatric, mental retardation, learning disabilities, traumatic brain injury) for whom competitive employment has not traditionally occurred, and who, because of the nature and severity of their disability, need ongoing support services in order to perform their job. Supported employment provides assistance such as job coaches, transportation, assistive technology, specialized job training, and individually tailored supervision.”


Talking Word Processors: Talking word processors are software programs that provide audio feedback as the student writes. As each letter is typed and each word is written, the device will “speak” it aloud. Many of these inexpensive writing programs also incorporate powerful tools for reading. Students with learning disabilities often find that having written material read aloud helps them to better edit, understand and organize their projects. These programs may offer other accommodations as well, such as enlarging text size and changing the color of text and graphics.

Text to Speech Programs: This software converts written text, including Word documents, Web pages, PDF files, and emails into audio files that play on a computer, CD-ROM player, MP3 device, IPOD or other digital audio playback equipment. Developed for individuals with low vision or blindness, text to speech technology has improved greatly, with natural sounding voices, greater conversion speed, and improved ease of use.

Touch Screens: A touch screen is a device placed on or built into the computer monitor that allows direct activation of the computer, or selection of a program, through a touch on the screen.

TTD or TTY: This is a telecommunications device for the deaf. TTY/TTD is a device with a keyboard that sends and receives typed messages over a telephone line.


Universal Design (UD): This is an approach to the design of products and environments that is aimed at making them accessible to all people, both those with and without disabilities. Examples of universally designed environments include buildings with ramps, curb cuts, automatic doors, widened doorways, and door handles (rather than knobs).

Universal Design for Learning (UDL): Universal Design for Learning is the design of instructional materials and activities that make learning goals achievable by individuals with wide differences in their abilities to see, hear, speak, move, read, write, understand English, organize, engage, and remember. UDL is achievable via flexible curricular materials and activities that provide alternatives for students with differing abilities. These alternatives are built into the instructional design and operating systems of the educational materials; they are not added on after-the-fact.


Video Phone: A video phone has a screen that permits users to conduct real-time audio and visual conversations. It is useful for those who use sign language to communicate and for individuals who do not have access to medical and diagnostic personnel. Increasingly assessments, including assistive technology assessments, are being conducted at a distance using video phone technology.

Vocal Output Communication Aid (VOCA): A Voice Output Communication Aid (VOCA) is an electronic device that generates spoken language for individuals who are unable to use natural speech to express their needs and to communicate with others during a conversation. These devices are intended solely for communication purposes.

Vocational Rehabilitation (VR): Vocational rehabilitation services, sometimes referred to as “Voc Rehab,” are services provided to individuals with disabilities so that they can develop the skills and motivation to find, secure and hold a job.Vocational Rehabilitation Agency: Vocational rehabilitation agencies are publicly-funded state agencies that assist youth with disabilities in their transition from school to work. These agencies seek to help such youth become integrated, independent, employed members of the community.

Voice Recognition: Different types of voice recognition systems (also called speech recognition) are available. Voice recognition allows the user to speak to the computer, instead of using a keyboard or mouse, to input data or control computer functions. Voice recognition systems can be used to create text documents such as letters or email, to browse the Internet, and to navigate among applications and menus.


Web Accessibility: Universal accessibility to the World Wide Web means that all people, regardless of their physical or developmental abilities, have access to Web-based information and services. Making Web pages accessible is accomplished by designing them to work with adaptive technologies, such as screen readers. It also means making color, font size, and page design decisions that make it possible for the widest range of individuals to access the information.

Word Prediction Programs: Word prediction programs allow the user to select a desired word from an on-screen list located in a prediction window. The computer-generated list predicts words based on the first or second letter(s) typed by the user. The word may then be selected from the list and inserted into the text by typing a number, clicking the mouse, or scanning with a switch.


X-10 Unit: X-10 is a communications “language” that allows compatible products to talk to each other using the existing electrical wiring in one’s home. Most X-10 compatible products are very affordable and, because they use existing wiring, no costly rewiring (“retro-fitting”) is necessary. Installation is simple; a transmitter is installed in one location in the home and sends its control signal to a receiver in another location.