R5RS is the Revised5 Report on the Algorithmic Language Scheme. Thanks to the efforts of several volunteers, we provide it in numerous formats.
The master copies are available in DVI and PostScript. You can also get it in PDF (thanks to Brad Lucier), HTML (thanks to Dorai Sitaram, and Bill Robinson for the frames), and CHM (thanks to Jonas Lund) formats. We also offer a tar.gz bundle of the HTML files.
The older report, R4RS, is also available in Windows HLP format (thanks to Sergei Egorov).
The journal Higher-Order and Symbolic Computation (formerly Lisp and Symbolic Computation, which published archival versions of so many excellent papers on or using Scheme) has the document in its archive. The formal citations are
R. Kelsey, W. Clinger, J. Rees (eds.), Revised5 Report on the Algorithmic Language Scheme, Higher-Order and Symbolic Computation, Vol. 11, No. 1, August, 1998
and
ACM SIGPLAN Notices, Vol. 33, No. 9, September, 1998