Computers have numerous applications across many fields of modern life. They are integral to education, allowing students to perform coursework and gain job skills. Libraries rely on computers for acquisition, classification, cataloging, circulation and serial control. Science and technology are also heavily dependent on computers, which have changed their face and are an essential part. Medicine and health have been greatly enhanced by computer technology, particularly in hospital environments. Businesses use computers from manufacturing to sales and cannot function without them. Accounting, communication, networking and more are computer-based. Computers also provide entertainment through movies, music and games. Their applications are found everywhere computations and complex data are involved, across all spheres of life.