Materiality of Cooperation. - 'Harmony, Not Discord'.- The Interface of the Loading Ramp.- Version Control.- Chains of Co-operation in the 1940s.- On Identification.- Routines of Cooperation in Creative Work.- Bodies/technology on Standby.- Strapping and Stacking.- Creating Trans-situativity.- Varieties of Trans-sequentiality.- Ecologies of Media Practices.- Socio-material Practices in Irritating Situations. The Irreducibility of Technical Skill.