GRANDVIEW HEIGHTS, Ohio (AP) - Libraries are tweeting, texting and launching smart-phone apps as they try to keep up with a computer-savvy class of people who consider card catalogs as vintage as typewriters.

The latest national data shows that library visits and circulation climbed nearly 20 percent from 1999 to 2008.

Since then, technology has continued to drive physical visits, circulation and usage, says Chris Tonjes, the information technology director at the public library in Washington, D.C.

Thousands of cardholders have downloaded free music from library websites and scores more are waiting months to check out Kindles.