SAN FRANCISCO (AP) — Personal computer sales sagged during the spring as shifting technology trends, upcoming product releases and a shaky economy dampened demand for the machines currently on the market.

The second-quarter decline in the U.S. ranged from 6 percent to 11 percent compared with the same time last year, according to separate reports released Wednesday by Gartner Inc. and International Data Corp. Gartner came up with the lower of the two figures in the research firms’ quarterly look at shipments of desktop and laptop computers.