There was a time not very long ago, say just 10 years ago, when we would buy and develop a roll of film if we wanted to take pictures. There were limited number of pictures that you could take and if you wanted to take many pictures you had to carry as many rolls and batteries.
Many rolls or frames would be wasted if the pictures were not of your liking; but you could do nothing about it. The money was wasted and you had to bear it. If you were a little careless then the entire roll could be exposed and thus go waste and you would be left with nothing. In the world of snap shooting, after Polaroid cameras, Digital cameras have brought about a revolution. They have completely revolutionized the way people take pictures.
Digital cameras can be called a computer accessory too because you can download the pictures in the computer and take out the print outs. You may email to any one that you wish to.