Dell today posted disappointing results for its latest quarter ended in October. The company saw its year-over-year revenue drop 15 percent to about $12.9 billion and its net income drop even further, falling 54 percent to $337 million. Both decreases were blamed on poor results both in the public sector and in its staple home PC business, where its shipments were up about 17 percent compared to a year earlier but its revenue was down 10 percent, an indication that many buyers were opting for less expensive PCs.