Digital cameras
A digital camera is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor.
Many compact digital still cameras can record sound and moving video as well as still photographs. Digital cameras can do things film cameras cannot: displaying images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, recording video with sound, and deleting images to free storage space.
Digital cameras are incorporated into many devices ranging from PDAs and mobile phones (called camera phones) to vehicles.
The Hubble Space Telescope and other astronomical devices are essentially specialised digital cameras.
Taking photographs for input to computers, for input to Photo printers
