Back in January, Dell launched the first of three mobile workstations of its new Precision line-up, the Dell Precision 3520, an affordable and fully customizable 15-inch laptop, along with Dell Precision 5520, which the company dubbed as world’s thinnest and lightest 15-inch notebook powered by Ubuntu Linux. Three months later, Dell expands the Ubuntu-based Precision line-up with two more models, the Dell Precision 7520 and Dell Precision 7720 as world’s most powerful 15-inch and 17-inch mobile workstations powered by the Ubuntu operating system, and now they’ve released Dell Precision 5720 All-in-One.