Quality Developers is a company that writes programs to do specific jobs for other companies. These programs are called:

Answerlistening;

Gamma rays  and beta particles are all  used  to treat internal organs. x-rays  are produced by firing electrons at a metal target and  gamma rays  are emitted by the nucleus of radioactive atoms.  gamma rays  are  used  to kill cancer cells, and to  medical  equipment and in radioactive tracers.