| Abbreviation | Definition |
|---|---|
| DCLS | Dauphin County Library System |
| DCPC | Digital Collections Production Center |
| DCPL | DeKalb County Public Library |
| DCPL | District of Columbia Public Library |
| DCPL | Dodge City Public Library |
| DCPL | Dougherty County Public Library, Albany, Georgia |
| DCPLD | Delta County Public Library District (Delta County, CO) |
| DCRB | Descriptive Cataloging of Rare Books |
| DDA | Danish Data Archive |
| DDA | Demand-driven acquisition |
| DDB | Die Deutsche Bibliothek |
| DDBL | Dorothy Duncan Braille Library |
| DDC | Dewey Decimal Classification |
| DDL | D Dynamic Libraries |
| DDL | Development Data Library |
| DDLS | Distance and Distributed Library Services |
| DDTP | Debian Description Translation Project |
| DEHA | Department of the Environment and Heritage |
| DELL | Digital Electronic Link Library |
| DELNET | Developing Library Network |