Initialism of Uridine Diphosphate.
"The biological process involves converting glucose into UDP to facilitate further metabolic reactions."
In plain English: UDP is a fast internet method that sends data without checking if it arrived safely, making some information get lost but keeping things quick.
"The developer fixed the bug by updating the UDP port configuration on the server."
Initialism of Ulster Democratic Party.
"The UDP candidate won the local election in Belfast last year."