Computers have entirely changed the world. they have many works easier and it less time consuming. like for everything like filling a form or booking a ticket, we can do by computers. we even can make drawings, documents and presentations in computer. it makes work attractive. most of the work, including shopping can also be done through computers while being at home. most of the medical test and surgeries are done by computers. it also helps in education and offices.they have replaced older means and have changed and evolved the world.