第一代语言（1GL）或机器语言是一种低级的面向计算机的进程设计语言，使用0和1表示各种命令。

起初，没有为第一代语言使用的编译器或连接器，指令是通过计算机系统开关的皮肤输入到系统中的。

机器语言的特点是执行速度快，效率高，但是难以学习、记忆和修改，同时它的移植性很差。

A first-generation programming language (1GL) is a machine-level programming language.

Originally, no translator was used to compile or assemble the first-generation language. The first-generation programming instructions were entered through the front panel switches of the computer system.