Computer Application & IT is the study, design, development or management of computing technology such as networking, software applications and computer hardware for business operations. There’s a slight difference between Computer Science and Computer Applications. Computer Science is a detailed and systematic study of the fundamentals of working on a computer, whereas computer applications are the study of the application of computer software. In short, while the former is a study of how computers work, the latter helps us understand all sorts of work that can be done on a computer.