The process where the programmer steps through each of the program's statements one by one is called .
I think that people have lost their jobs because of an increase of computers. Also, a<span>utomobiles can crash and injure and kill people. </span><span>Ships can be sunk. </span><span>Poorly constructed or maintained machinery can harm the workers. </span><span>The telegraph put the pony express out of business. </span><span>Many factories pollute the water and air. </span>