degenerated disc disease. Mechanical breakdown of the integrity of a disc, which produces symptoms initially because of mechanical instability and later productive of root or cord compression owing to the development of osteophyte outgrowths.

Digital Digital Digital. A designation that indicates the recorded material was first recorded with digital equipment, then remixed on digital equipment and finally placed onto a digital recording medium..

Degenerative disc disease. loss of elasticity and flexibility of the disc. Although it can happen quickly, most DDD develops over time due to use or misuse.

District Deputy Director

Deputy District Director

Direct Distance Dialing; easy, fast telephone service which permits customers to dial their own long distance calls.

Direct Distance Dialling.

Direct Distance Dialing Any switched telecommunication service (like , , etc.) that allows a call originator to place long distance calls directly to telephones outside the local service area without an operator.

Dichlorodiphenyldichloroethane

1,1-dichloro-2,2-bis(-chlorophenyl)ethane

8.14 NA NA 3 CREG Source: ESE, 1994b

DDD was a commonly used pesticide in the past, but is now banned in the United States.

Division of Developmental Disabilities

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Daily Defined Dose

Draft Decision Document

The ability of a caller to place a call without the assistance of the operator.

Detailed Design Document

Number of the day in the year