Computers have applications in almost every sphere of life where computations are required to be done quickly with complex data. Computers are used at home for entertainment, at schools where teachers use them to enhance lessons, and in space technology where satellites provide important information for research. They are also used widely in offices to store data, in libraries to catalog books, in medical settings to assist with tests and record keeping, and for transportation reservations and banking transactions. Overall, the document outlines the various uses of computers in different domains like home, education, research, business, healthcare and more to perform tasks efficiently.