More shoppers are clicking their way to holiday gifts, according to a new survey.

Nielsen/NetRatings reported that the number of online shopping trips grew 33 percent from a year ago during the latest monitored week. The research firm counted 462 million visits to sites operated by 100 online retailers for the week ending Dec. 4.

The fastest-growing category was books/music/video, which gained 238 percent. Apparel ranked second for year-over-year growth; it was up 38 percent.