News Summary: War buffs dial up Gettysburg apps

TECHIE CIVIL WAR BUFFS: In the weeks leading up to the 150th anniversary celebration of the Battle of Gettysburg, apps that offer maps and information about key battle spots have surged in popularity.

DIALING IN: Free Battle Apps have videos with guides telling the stories behind the historic sites where users are standing. Old photos show how a landscape looked during the war. Virtual signs pop up when a smartphone camera is pointed at a historic site.

MORE SOCIAL MEDIA: More than 5,700 Foursquare users have checked in at sites in the historic borough. More than 16,000 Facebook users have liked it.