Architect your own benchmarks. Open-source development has been the single most significant contributor to the development community, and the contributions are used across the IT landscape including corporations, universities, schools, etc. Open-source development skills enable developers to understand the intricacies of softwares, enabling robust decision-making while choosing technologies over trends and making mature decisions on a day-to-day development basis. This book is for all programming enthusiasts and is designed to be a Source code 101 level book, but it can help developers elevate to architect-level decision-making as well as architects to make solid software decisions while building the systems. Programming languages like Python, Lua, C, C++ (compilers), Lua, Rust, database systems, caching systems, web frameworks, and libraries, the availability of open-source code systems has greatly impacted visibility and democratized developer access to enterprise-grade software, resulting in rapid innovation at minimal cost. The impact of open-source software is greater than we can imagine, and the software mentioned here are just the tip of the iceberg. A programming language contains a parser, symbol table generator, compiler, assembler, and interpreter, to mention a few common phases, along with memory management, thread management, configurations, data structures, and many more. While exploring multiple languages, we can note that the code stages remain almost identical.