C language (wikipedia) is a programming language developed by Dennis Ritchie. It is an imperative, statically typed language.
C code maps efficiently to machine instructions because of its low level.
C1X final draft
POSIX standard (Wikipedia)
"Base Specifications". Posix.1-2008 (7). The Open Group
C standard library (Wikipedia)
C - Infrequently asked questions
What every programmer should know about memory (Ulrich Drepper)
Latency Numbers Every Programmer Should Know
How to C (as of 2016)
SEI CERT C Coding Standard
Secure Programming HOWTO - Creating Secure Software
The C Preprocessor
GCC command line options
Bison (Parser generator)
Flex The Fast Lexical Analyzer
GDB: The GNU Project Debugger
Git Command Quick Reminder
C data types
C data types (Wikipedia)
IEEE floating point (Wikipedia)
What Every Computer Scientist Should Know About Floating-Point Arithmetic
Can a IEEE 754 real number “cover” all integers within its range?
Anatomy of a floating point number
Abstract Data Types (ADT)
An abstract data type (ADT) is a data type whose representation is hidden from the client.
When coding an ADT we focus in data and the operations we perform with it, without focusing in its internal implementation.
ADT is a way to provide encapsulation to our program design.
Abstract data type (wikipedia)
Why Study ADT
ADT in C
How to use assertions in C
C does not provide a direct exception mechanism, but we can implement one using non-local jumps (setjmp) or with goto-s:
C: goto statement considered helpful (Exception mechanism)
C: goto statement considered helpful
C - POSIX - Multithreading Programming
C POSIX Multithreading Programming
The International Obfuscated C Code Contest
Bad code is also interesting...