A missile or a rocket is only as good as the system that steers it, and steering was Khartron's art. Its engineers developed the control systems for a lineage of Soviet strategic missiles that reads like a NATO threat briefing - the SS-9 Scarp, the SS-19 Stiletto, and above all the SS-18, the giant known in the West by the chilling nickname Satan. These were the weapons at the center of the nuclear standoff, and the mathematics that pointed them was written in Kharkiv. It is a sobering thing to consider: that the balance of terror which shaped half a century of history depended, in part, on the quiet, precise work of engineers in a design bureau on the edge of a Ukrainian city, solving problems of guidance and trajectory the world would never see.

The same skills that aimed missiles could also lift science into orbit, and Khartron's reach into space was extraordinary. It was the principal developer of the control system for Energia, the most powerful Soviet rocket ever built. Its systems governed the scientific modules of the Mir space station - Kvant, Kristall, Spektr, and the rest - and, later, the Zarya module, the very first component of the International Space Station to reach orbit. Khartron claims a distinction no one else can: it is the only company in the world to have provided fully automatic docking of heavy, twenty-ton spacecraft. To bring two objects that massive together in the vacuum of space, gently and without a human hand on the controls, is a feat of control engineering of the highest order.

When the Soviet Union dissolved, Khartron faced the challenge that confronted much of the old military-industrial world: what to do with weapons expertise in a time of peace. It adapted with striking versatility. The mighty SS-18 and SS-19 missiles were converted into the Dnepr and Rokot space launchers, lofting satellites for Ukraine and foreign customers. In 1994, Khartron formed a joint venture with the American firm Westinghouse - called Westron - to modernize the instrumentation and control systems of Ukraine's nuclear power plants, work so significant that U.S. President Bill Clinton singled it out during a visit to Ukraine in 2000. From missiles the bureau branched into control systems for power plants, pipelines, railways, even radio-controlled toys - a sprawling second life built on the same fundamental mastery of measurement and control.

Behind the acronyms and the hardware were people, and their story includes loss. On 8 January 2014, a fire broke out at the Khartron plant in Kharkiv. Twenty-two workers were rescued, but eight did not make it out - eight lives ended in a single accident at a place devoted to controlling the uncontrollable. The bureau's history is bound up with its leaders too, engineers like Borys Konoplov and Volodymyr Serheiev who guided the work across generations. It is easy to think of a design bureau as an abstraction, a name on documents. But Khartron was always a community of engineers and technicians, ordinary people who happened to hold in their hands some of the most consequential technology of the twentieth century, and who carried its weight quietly, day after day.