Standards,Docs, etc.

Here we collect references to documentations about programming and API standards. Especially public available resources, since unfortunately most offical standards documents are not distributed freely.

C
C++
- ANSI C++ standard drafts
- C++ FAQ
Un*x & other API references
- POSIX.1
  (there's no legal copy available for free)
- Austin Group standard drafts:
  X/Open and POSIX join to unique definition. You can get the drafts for free if you register
- un*x man pages
- API, standards reference table
- Information about various un*x flavours
- miscellaneous Linux documentations
- linux man pages
Misc
Sources; libraries
- FreeBSD sources
- linux source code reference
- Freely Distributable LIBM (fdlibm)
  Missing math stuff can be found here
- cephes
  Math library, too

Definitions

Quoting the linux man pages (INTRO(2) linux Programmer's Manual)

SVr4: System V Release 4 Unix, as described in the "Pro- grammer's Reference Manual: Operating System API (Intel processors)" (Prentice-Hall 1992, ISBN 0-13-951294-2)
SVID: System V Interface Definition, as described in "The System V Interface Definition, Fourth Edition", available at ftp.fpk.novell.com/pub/unix-standards/svid/ [broken link!] in Postscript files.
POSIX.1: IEEE 1003.1-1990 part 1, aka ISO/IEC 9945-1:1990s, aka "IEEE Portable Operating System Interface for Computing Environments", as elucidated in Donald Lewine's "POSIX Programmer's Guide" (O'Reilly & Associates, Inc., 1991, ISBN 0-937175-73-0.
POSIX.1b: IEEE Std 1003.1b-1993 (POSIX.1b standard) describing real-time facilities for portable operating systems, aka ISO/IEC 9945-1:1996, as elucidated in "Programming for the real world - POSIX.4" by Bill O. Gallmeister (O'Reilly & Associates, Inc. ISBN 1-56592-074-0).
4.3BSD/4.4BSD: The 4.3 and 4.4 distributions of Berkeley Unix. 4.4BSD was upward-compatible from 4.3.
V7: Version 7, the ancestral Unix from Bell Labs.