What is a digital signautre?

What kind of batteries does a casio B.O.S.S. 64kb digital diary use? What Happens When You Look At The SlenderMan? How do you download pictures from your SD memory to your computer? What is the best camera for vlogging? Why can't you take pictures in Claire's? What is the adverb in the sentence I have tried hard to get good photographs of my friends? Is the camera on the computer running despite you not clicking anything to turn it on? Charge a brand new camera? Should I buy polaroid camera or digital camera? How does the infrared cameras work? What kind of batteries does the Fujifilm Finepix z200 take? What were camers like in 1860? What are the advantages of old film cameras? Can you change the number of pixels on a picture? What is the large apertures? Where can one purchase a Casio digital camera? What does vga mean in a camera? What is a reverse zoom? Does all exit signs have video cameras in them? Can you store images on a digital SLR?