Radiation particles are not only of nuclear man-made origin. They also are natural, coming as cosmic rays and solar wind in space. These particles constantly pervade the atmosphere and the natural material even at ground level were most electronic systems must function. As a whole, electronic systems may be less sensitive than their biological counterparts, but one single particle can disrupt functional systems such as power supplies and digital or analog circuits. This book provides the basics of radiation effects in electronics and optoelectronics, and design-in methods to improve the reliability of components and systems. This information is essential for practitioners, engineers, scientists and graduate students both as a starting point and for progression.