Technology is knowledge of using tools and machines to do tasks more efficiently. Technology has become a very important part of our lives nowadays. People are always trying to find something new that will improve our lives dramatically. Some of the discoveries that have really changed our lives are the computer, telephone, internet and e-mail, television and mobile. The technology that surrounds almost everyone in the modern society affects both work and recreational activities. Everything has a positive and a negative effect on our lives and so does technology. Technology may be very helpful but it can sometimes be very harmful. I am going to describe some of the advantages and disadvantages of modern technology.