Operating system
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An operating system is system software that manages computer hardware and software resources, and provides common services for computer programs.
IBM System/360 Model 50 operator's console and CPU; the operator's console is a terminal used by the operating system to communicate with the operator.
C (programming language)
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C is a general-purpose programming language created in 1972 by Dennis Ritchie. By design, C gives programmers relatively direct access to the features of typical CPU architectures, customized for the
Operating system
…improves security by minimizing the kernel and separating out other operating systems functionality by application. Most operating systems are written in C or C++, which create potential vulnerabilities for exploitation. Despite attempts to protect against them, vulnerabilities are caused by buffer overflow…
Dennis Ritchie (right), the inventor of the C programming language, with Ken Thompson
"Hello, World" program by Brian Kernighan (1978)