Practical Programming in C (MIT 6.087)

MIT's Practical Programming in C (6.087) is a free course on MIT OpenCourseWare teaching C programming fundamentals: pointers, memory management, data structures, and systems programming. C is the language closest to the hardware, used in operating systems, embedded systems, and any code where performance and control matter. After finishing, you can write C programs and understand memory management. The main limitation: C is unforgiving. Memory bugs (buffer overflows, null pointer dereferences) are easy to make and hard to debug. Modern C development uses tools like Valgrind.

C remains one of the top 3 programming languages globally and is the primary language for Linux kernel development and embedded systems (source: TIOBE Programming Community Index).