Our everyday technologies could have appeared terrifying to our ancestors: instantaneous disembodied communication, access to knowledge, objects with ‘intelligence’ that talk to us (and each other). Black boxes and intangible entities are omnipresent in our homes and lives without our necessarily understanding the hidden flows of data, unknown agendas, imaginary clouds, and mysterious rules that govern them. Have humanity's ways of relating to the unknown throughout history gone away, or have they perhaps transmuted into new forms? In an ongoing project, we have inventoried examples, encounters and reflections on contemporary technology, framed through the perspective of the haunted, spectral and otherworldly. In this paper, we excerpt this collection to illustrate the value and opportunity of an unfamiliar, disquieting perspective in helping to frame the frictions, beliefs and myths that are emerging around interactions with everyday technologies. We posit and demonstrate ‘spooky technology’ as an accessible framework to reflect and respond to our increasingly entangled relationships with technology.

Manually optimizing the tradeoffs between accuracy, performance and energy for resource-intensive applications with flexible accuracy or precision requirements is extremely difficult. We present ApproxTuner, an automatic framework for accuracy-aware optimization of tensor-based applications while requiring only high-level end-to-end quality specifications. ApproxTuner implements and manages approximations in algorithms, system software, and hardware.