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Where do I find the current C or C++ standard documents?

where are there good online resources for:

C89
C99
C++03

C++03 – ISO 14882:2003:
http://webstore.ansi.org/RecordDetail.aspx?sku=INCITS%2FISO%2FIEC+14882-2003

C99 – ISO 9899:1999:
http://www.open-std.org/jtc1/sc22/wg14/www/standards.html

C90 – AS 3955-1991:
http://webstore.ansi.org/RecordDetail.aspx?sku=AS+3955-1991

the C90 standard is much more useful than the significantly different C99 standard, since C99 hasn’t been widely implemented by compilers.