Survival Research Laboratories (SRL) is a machine performance art group founded in 1978 that stages elaborate shows featuring unique interactions between large, complex machines. SRL builds and maintains a large collection of machines, some dating back to the earliest days of the group. Their performances are carefully scripted but often end in the destruction of the elaborate sets and props. SRL shows employ a variety of energy sources and complex control systems to operate machines weighing up to 27 metric tons. The group is based in the San Francisco Bay Area due to its access to skilled volunteers, surplus military equipment, and the region's culture of innovation.