Reduction of resource consumption is essential to the Sustainable Development Goals. One key strategy for achieving this is product life-extension. Products can be maintained or remanufactured to a condition that is better than new. A fragmented literature uses terms such as remanufacturing, maintenance, repair, and overhaul (MRO), or simply service, to refer to various forms of product life-extension. Even though different terms are used, these operations share common characteristics and challenges that are distinctive compared to traditional manufacturing. Addressing the ambiguous use of terms for product life-extending operations and the fragmented body of knowledge, we introduce Aftermarket Production Systems (AmPS) as an umbrella term for industrialized product life-extending operations. The purpose of this paper is to provide an overview of AmPS-related literature and to discuss future directions for research on industrialized product life-extending operations.