A self-dual binary linear code is called Type I code if it has singly-even codewords, i.e.~it has codewords with weight divisible by $2.$ The purpose of this paper is to investigate interesting properties of Type I codes of different lengths. Further, we build up a computer-based code-searching program based on our knowledge about Type I codes. Some computation results achieved by this program are given.

翻译：自我二进制线性代码如果有单数编码,即 ~ 它有重量除以2. $ 的编码词, 则称为 类型I 代码。 本文的目的是调查不同长度的 类型I 代码的有趣特性。 此外, 我们根据我们对类型I 代码的知识, 建立一个基于计算机的代码搜索程序。 给出了此程序取得的一些计算结果 。