Ohjaimisto

Ohjaimisto is a Finnish term that refers to the collection or system of controllers, drivers, firmware and related software that govern the operation of a device or process. The word is formed from ohjain (controller) and the suffix -isto, which denotes a collective or system.

In information technology, ohjaimisto commonly describes the software stack that enables hardware components to function, including device drivers (ajurit) and firmware. It encompasses the components that translate user actions into device behavior and manage input/output operations.

In embedded systems, robotics and industrial contexts, ohjaimisto denotes the control architecture that coordinates sensors, actuators and processing units. In automotive applications, it can refer to the network of electronic control units (ECUs) and their control software that regulate engine, transmission, safety and comfort systems.

The term is typically used to distinguish the broader control software ecosystem from more specific elements such as individual drivers or firmware modules. It may also imply modularity and the possibility of updates, depending on the device and its maintenance model.

See also: ohjain, ohjausjärjestelmä, laiteajurit, firmware.