A digital camera (or digicam) is a camera that takes video or still photographs by recording images on an electronic image sensor. Most cameras sold today are digital, and digital cameras are incorporated into many devices ranging from PDAs and mobile phones(called camera phones) to vehicles.
Digital and film cameras share an optical system, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The diaphragm and shutter admit the correct amount of light to the imager, just as with film but the image pickup device is electronic rather than chemical. However, unlike film cameras, digital cameras can display images on a screen immediately after being recorded, and store and delete images from memory. Many digital cameras can also record moving video with sound. Some digital cameras can crop and stitch pictures and perform other elementary image editing.
Television (TV) is a telecommunication medium for
transmitting and receiving moving images that can be monochrome (black-and-white) or colored, with or without accompanying
sound. "Television" may also refer specifically to a television set, television programming, or television
transmission.The etymology of the word has a mixed Latin and Greek origin, meaning "far sight": Greek tele, far,
and Latin visio, sight (from video, vis- to see, or to view in the first person).