dryriver writes: Global personal computer (PC) sales have fallen for the fifth quarter in a row, making it the "longest duration of decline" in history. Worldwide PC shipments totalled 76 million units in the second quarter, a 10.9% drop from a year earlier, according to research firm Gartner. PC sales have been hurt in recent years by the growing popularity of tablets. Gartner said the introduction of low-cost tablets had further hurt PC sales, especially in emerging economies. "In emerging markets, inexpensive tablets have become the first computing device for many people, who at best are deferring the purchase of a PC," said Mikako Kitagawa, principal analyst at Gartner, said in a statement.