Most definitions found in this glossary are adapted with permission from this text book:

Maheu, M., Whitten, P., & Allen, A. (2001). eHealth, Telehealth & Telemedicine: A Guide to Startup and Success. New York: Jossey-Bass.

Browse the glossary using this index

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Centers for Medicare & Medicaid Services (CMS)

Is the federal agency that administers the Medicare, Medicaid and Children’s Health Insurance Program.

Entry link: Centers for Medicare & Medicaid Services (CMS)

Charge-coupled device (CDD)

A device that converts light into electronic information via sensors that collect light as a buildup of electrical charge. The signal that results from this conversion can be translated into computer code to form an image. This device is commonly used in television cameras, digital still-image cameras, and image scanners.
Entry link: Charge-coupled device (CDD)

Chat room

An Internet site or virtual community that provides real-time communication via the exchange of text messages (as well as sound and video files) between participants.
Entry link: Chat room

Children’s Waiver Services Program

Is a federal program that provides Medicaid-funded home and community-based services to children under age 18 who are eligible for, and at risk of, placement into an Intermediate Care Facility for the Mentally Retarded (ICF/MR).


Entry link: Children’s Waiver Services Program

Click stream data

Information used by Web advertisers showing the number of Web page visits or clicks of the mouse by a consumer visiting a Web site.
Entry link: Click stream data

Cloud Computing

Cloud computing refers to the data being duplicated and stored on more than one distant computer system, the redundancy providing protection against a "crash" of any one of the cloud's computers.
Entry link: Cloud Computing

Coaxial cable

A single or dual transmission wire that accommodates high bandwidth. Cable is used to transmit broadband data, voice, and video.
Entry link: Coaxial cable


Coder-decoder. Hardware or software (or both) that converts an analog video signal to digital, then compresses it. At the receiving end, the signal is decompressed and converted back to analog output by a compatible codec.
Entry link: Codec


Describing the ability of hardware, software, and data to work together without data loss, changes, or other manipulations. Standards-based specifications of procedures, equipment interfaces, and data formats are essential for minimizing incompatibility.
Entry link: Compatible

Compressed video

Video images that have been compressed to reduce the amount of bandwidth needed to transmit information. They can then be sent over less expensive transmission media (land-based T-1 lines rather than via satellite, POTS lines rather than ISDN, and so on).
Entry link: Compressed video

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