Organic electronics hold the promise for application in flexible displays, printable electronic circuits and inexpensively produced solar cells. Molecular electronics, on the other hand, aim at ultimate miniaturization with molayers or even single molecules as the active elements of electronic devices. This book brings the two communities together for information interchange. A section on molecular-scale electronics stresses the absolute need for good statistics when evaluating experimental data, with recent progress demonstrated. A section on interfaces - crucial elements for understanding both macroscopic organic as well as molecular electronics - clearly indicates the need of a multidisciplinary approach. Charge transport phemena on several lengths scales, and new developments for different types of organic devices, namely transistors, sensors, solar cells and light emitting devices, are also reported; the viability of the organic-based techlogy is highlighted.