A digital computer is an electronic device that processes data using binary numbers, which consist of 0s and 1s. It performs various tasks, such as calculations, data storage, and information retrieval, by executing programmed instructions. Digital computers are widely used in everyday devices like smartphones, laptops, and tablets. These computers operate using components like the central processing unit (CPU), memory, and input/output devices. They can be classified into different types, including personal computers, servers, and supercomputers, each designed for specific applications and performance levels. Digital computers have revolutionized how we work, communicate, and access information.