将一篇英文文章翻译成中文，并输出结果。


文章: The history of computer science began long before the modern discipline of computer science that emerged in the twentieth century. Its roots go back to the pre-mechanical era of the abacus, an ancient mathematical tool used by merchants throughout the world. The advent of electronic computers in the mid-20th century ushered in the current digital age.
计算机科学的历史早在20世纪出现的现代计算机科学学科之前开始。其根源可以追溯到算盘的时代，算盘是一种古老的数学工具，被世界各地的商人使用。20世纪中叶电子计算机的出现开创了当前数字化时代。