Plain English Meaning
DUATS was an older online system pilots used to get weather information and file flight plans themselves, instead of phoning a briefer. It has since been retired and replaced by newer online services.
Full Definition
A former FAA-funded service that allowed certificated pilots to obtain official weather briefings and file flight plans directly through an internet or computer connection, without needing to call a Flight Service Station. The DUATS program was discontinued in 2018 and replaced by 1800wxbrief.com and other approved third-party providers.
Context Anchor
Seen in older FAA weather-reporting discussions as one of the ways pilots could receive METARs and other official .