Welcome to the Tech Handbook

This site is a developer-oriented technical handbook. It covers algorithms and data structures, the Linux kernel, computer networking, large language models and AI systems, finance fundamentals and quantitative strategies, system architecture and engineering practice, along with a built-in AI chat tool and IELTS study materials. Every chapter takes an engineering perspective with code examples and architecture diagrams, aiming to help readers understand the design rationale and implementation details of each module. Please use the sidebar on the left to pick a chapter and start reading.