The GNU C Library (glibc) is the standard C library on Linux systems. Other C libraries exist and are sometimes used for special purposes (such as very small subsets of the standard C libraries used for embedded systems and bootstrapping), but glibc is the standard C library on all Linux distributions. It provides a significant portion of the functionality documented in Linux Application Development in fact, this book might more accurately but less concisely have been titled Linux and glibc Application Development.
