More sophisticated cameras may have internal floppy disk drives or even tiny hard disks . The best can store a hundred pictures or more and even record sound bytes to go with each shot. They're fine for small groups or landscapes, but tend to exaggerate noses and chins on closeups. Better models have zoom lenses that range from wide-angle to short telephoto. They'll produce better portraits.
Most cameras come with a built-in automatic flash.
The most important convenience feature is a liquid crystal display screen on the back of the camera. On some models, the LCD takes the place of the viewfinder, so you can see exactly what you're shooting. On other cameras, you'll find an optical viewfinder and an LCD that displays shots after you've taken them. Either way, better cameras will allow you to flip through the photos you've taken and erase shots you don't want.