A few of the large 111mm / 4 1/2" Swiss Army knives include a fully serrated blade. It has an action that is intermediate between a blade and a saw-- just perfect for cutting bread, meats, and other soft items that you'd take to a picnic. It's also better than a plain blade for cutting rope, so it's used on the two "nautical" models designed for sailors and boat owners.
WARNING: Be extra careful with serrated blades! They can cause nasty, ragged lacerations that take much longer to heal than cuts from a straight blade.