More specifically, they provided a software abstraction, through APIs, called device drivers.

更具体地说，他们通过 API 提供了一个软件抽象，称为设备驱动程序。

Four hundred sensors send messages to signs at street intersections, and GPS devices direct drivers to the nearest available parking spaces, reducing traffic congestion.

400个感器发十字路口的信号，而GPS装置能将司机直接引导至最近的空车位，从而减少交通拥堵。