The acronym for utility distribution company, an entity with its own distribution system for the delivery of energy to and from the ISO-controlled grid. The UDC provides regulated, retail service to eligible end-use customers who are not yet eligible for direct access, or who choose not to arrange services through another retailer.

Utility Distribution Company. A company that operates and maintains the electric system to deliver energy to the end user. It also provides "Standard offer" – the traditional package of electric service at regulated prices for customers who choose not to participate in the competitive market.

daily average portion of a refinery's rated throughput capacity utilized for a given period. The closer the UDC is to the refinery's rated capacity, the more efficient the refinery is.

Utility Distribution Company. a distribution wires business and a regulated retailer who serves end-use customers

Unified Digital Campus

Universal Digital Carrier. Aka Digital Loop Carrier (DLC) - where two analog telephone lines are placed onto one digital copper pair. Used where a customer requests a second line, but no additional copper pairs are available. Central office routes the two lines to a UDC trunk which is then connected to the copper pair that carries the digital transmission to the customer's premises. UDC adapter is connected at the demarcation point, which converts the UDC transmission into 2 analog lines.

Universal Decimal Classification