Resumen
The article argues that allowing evolution to explore highly unconventional circuits can be advantageous. Analysis of the evolved circuits enhances their utility, but requires novel approaches. Its still not fully understood how it works, the core of the timing mechanism is a subtle property of the very large scale integration medium. Most possibilities have been ruled out, like circuit activity, including glitch-transients and beat-frequencies, metastability and thermal time-constants from self-heating. This small effect, is amplified by alterations in bistable and transient dynamics of oscillatory loops and how this is used to derive an orderly near-optimal output is understood in detail. Certain peripheral cells fine-tune particularly sensitive time delays. On the key question of long-term consistency of behavior, the entire field programmable gate arrays circuitry is strongly reset to a deterministic stable logic state for every high half-cycle of the input waveform.

Resumen
The future of computer software is discussed in this article. Society is increasingly dependent on large and complex software systems. Users need software that meets stringent requirements, support a range of interaction styles, produced quickly and can be maintained to keep pace with the ever-increasing demand for functionality, quality, flexibility and cost-effectiveness. Producing such software is difficult and involves high costs and risks. Adopting the most appropriate methods, technologies and tools at just the right time is a major problem for the software industry. Authors aim to extend the debate over how software will be developed and used in two ways by stepping back from a detailed technology focus and incorporating views of experts from different disciplines. The Distributed Center for Excellence in Software Engineering aims at generating new ideas on the future direction of systems and software engineering. Its major purpose was to help meet the long-term planning needs of software based companies including British Telecommunications PLC (BT). Its recommendations, "economics of software" and "society's understanding of software systems" are now formal projects within BT.