For realizing symbolic substitution rules of binary addition. This paper proposes a simple optical logic system which includes only one 2-d array of optical bistable device.

为了实现二进制加法符号替换规律，本文提出了一种简单的光逻辑系统，它仅包括一片二维列阵光学双稳器件。

youdao

The so called binary system, 1 these zeros and ones that you'd probably have some vague sense underlie all computers today actually reduced to the exact same grade school kind of math and system except with computers, 1 because it's a lot easier to use just two digits, zero and one.

所谓的二进制就是，你觉得模糊的0与,在电脑上计算,事实上可以简化为跟小学数学一样,只是在电脑上计算而已，因为它更容易，仅仅使用两个数字，0与。

哈佛公开课 - 计算机科学课程节选