A Upup is a Puppy that has some compatibility with Ubuntu. Typically produced using Woof with Ubuntu packages. Often they are named after the Ubuntu version name, for example Lucid, Jaunty and Precise

Raring Upup Raring 3.8.4.2 by pemasu

PuppyPrecise - Upup created by BarryK

Puppy526 Lucid - popular Upup and official community Puppy from version 5.00 to 5.28 developed by playdayz

PuppyPrecise developed by BarryK, beta7 announcement

Upup Ov-Precise 5.3.0 developed by Oldyeller, thread

Upup Upup Precise 5.3.3.3 developed by pemasu, thread

Jaunty Puppy Alpha9, developed by BarryK, see Jaunty Puppy Alpha9 feedback

Lucid 5.28 updates latest thread