计算机能自动连续地工作，是由程序控制而实现的，程序是用程序设计语言按任务的要求事先编写的。程序设计语言按发展过程分为：机器语言、汇编语言和高级语言。-computer automatically consecutive work is programmed to achieve the procedure is used programming language by the requirements of prior preparation. By programming language development process is divided into : machine language, assembly language and high-level language.