Remain treats residue not as passive survival but as an active temporal and material condition. What persists after media systems, performances, infrastructures and histories have supposedly ended continues to organise the present through debris, repetition, latency and unfinished violence. The book’s central operation is to split the word “remain” into noun, verb and imperative: remains are material fragments, remaining is an ongoing process, and “remain” is a demand to resist disappearance. Parikka’s scattered media, Jucan’s conceptual framing and Schneider’s attention to performance refuse the clean chronology of technological replacement. Obsolescence does not erase; it redistributes matter, labour and memory into less visible environments. The theoretical contribution lies in shifting media studies from devices and messages toward the conditions that endure around them—waste, extraction, bodily repetition and historical afterlives. Methodologically, the volume pairs divergent voices around one term, allowing conceptual friction to expose its complexity. It bridges media archaeology, performance studies and environmental humanities by showing that technical culture is governed as much by what remains as by what appears new.