Also, these cameras remember the images you take in different ways. Some have internal memories that retain the images until you download them. In other words, you can't just pop in a new roll of film when you've hit your limit. When the memory is full you have to transfer the images from your camera to your computer or printer. Other cameras store the images on removable disks, so you can just pop in a new disk when you need to.
Some cameras have both internal and removable memory.
You'd probably want to take one with removable storage on a vacation if you plan to take a lot of photos. Remember to check into this thoroughly because this is where digital cameras can differ dramatically. On average, they can store anywhere from four to 24 high-quality images and this makes a big difference when it comes to how many times you need to switch disks or download data. But then, you don't have to deal with going to the photo processor either. The image files you create with a scanner are the same as those created by digital cameras.