🔧 C

The language of operating systems, kernels, and firmware. Closest to the metal without writing assembly.

Learning Path

Stage	Resource	Link
Beginner	Programming in C (NPTEL, IIT Kanpur)	NPTEL
Beginner	C Programming (Neso Academy)	YouTube
Intermediate	Beej's Guide to C	beej.us/guide/bgc
Advanced	Linux Kernel (Bootlin)	bootlin.com/training/kernel
Expert	The C Programming Language (K&R)	Classic textbook

Frameworks & Libraries

Embedded / RTOS

→ See Embedded Track

Library	Use	Link
FreeRTOS	Real-time OS	freertos.org
Zephyr	Modern RTOS	zephyrproject.org
CMSIS	ARM Cortex-M HAL	arm.com/cmsis
lwIP	Lightweight TCP/IP	savannah.nongnu.org/projects/lwip

Systems / Networking

Library	Use	Link
libuv	Async I/O (Node.js core)	libuv.org
libcurl	HTTP client	curl.se/libcurl
SQLite	Embedded database	sqlite.org
OpenSSL	Cryptography	openssl.org

Books (Free)

Book	Link
Beej's Guide to C Programming	beej.us/guide/bgc
Beej's Guide to Network Programming	beej.us/guide/bgnet
Modern C (Jens Gustedt)	gustedt.gitlabpages.inria.fr/modern-c
Linux Device Drivers (LDD3)	lwn.net/Kernel/LDD3

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Cross-references: Embedded Track · Systems Track · Subjects: OS & Kernel