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Template:Divisor classes

DMARC

DMSO reductase

DNA re-replication

DNA sequencing

DNA nanotechnology

DNA (cytosine-5)-methyltransferase 3A

DNS Certification Authority Authorization

Document Object Model

Open-source software

List of open-source codecs

7-Zip

AdBlock

Adium

Amanda (software)

Agrep

AIGLX

Alfresco Software

Alien (file converter)

Amarok (software)