Centered on a timely and relevant theme of 'Technological Innovation for the Internet of Things', the 4th Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS’13), brings the importance of Internet of Things (IoT) under the spotlight. The Internet and mobile connectivity together with the vision of the IoT promises exciting challenges for researchers and industry and benefits for society. The IoT is an integrated part of Future Internet and could be defined as a dynamic global network infrastructure with self configuring capabilities based on standard and interoperable communication protocols, enabling the interlinking of the physical world with the cyberspace. A key challenge for successful usage of IoT in the future is to identify the various areas which will be influenced by or contribute to the future development of the Internet of Things - energy efficient communication, scalable architectures of networks, bio-inspired algorithms, energy-aware systems, energy harvesting, smart and micro devices, biomedical devices, service triggered security, self-organizing systems, distributed decision making, collaborative networks and ecosystems, connected machines and robotics, remote operation and supervision, collective adaptive systems, nano-electronics, etc.