C allows you to interact directly with your OS (especially true for unix OSes). This in turn helps you to understand how a specific higher-level feature is impl

C allows you to interact directly with your OS (especially true for unix OSes). This in turn helps you to understand how a specific higher-level feature is implemented, how can it be used, how and when can it fail, and how to debug it in all the other programming languages, like `subprocess' module in Python, polling descriptors (any language), or ports in Erlang.