系統設計101 https://github.com/ByteByteGoHq/system-design-101
中文算法講解, 含多種編程語言實現 https://github.com/krahets/hello-algo, 提供PDF版下載
阿里巴巴Java開發手冊 https://developer.aliyun.com/ebook/386
各個語言快速入門 https://learnxinyminutes.com/
程序員必知必會 https://github.com/mtdvio/every-programmer-should-know
C# 重點知識： https://www.geeksforgeeks.org/c-sharp/csharp-programming-language/
java 重點知識： https://www.geeksforgeeks.org/java/java/