Photographers use their technical expertise, creativity, and composition skills to produce and preserve images that visually tell a story or record an event. Most photographers use digital cameras instead of the traditional silver-halide film cameras. Digital cameras capture images electronically, so the photographer can edit the image on a computer. Images can be stored on portable memory devices, such as compact disks, memory cards, and flash drives. Once the raw image has been transferred to a computer, photographers can use processing software to crop or modify the image and enhance it through color correction and other specialized effects. Photographers who edit their own pictures use computers, high-quality printers, and editing software. Although formal education is not required for most photographers, many take classes or earn a bachelor’s degree in a related field, which can improve their skills and employment prospects.