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MASSACHUSETTS INSTITUTE OF TECHNOLOGY\\
ARTIFICIAL INTELLIGENCE LABORATORY
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A.I. Memo No.\ 848b \hfill November 1991 \par
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{\Large\bf
	Revised$^{\bf 4}$ Report on the Algorithmic Language \\
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				Scheme } \\
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{\small
\begin{tabular}{l@{\extracolsep{.2in}}lll}
\multicolumn{4}{c}{W{\sc illiam} C{\sc linger and} J{\sc onathan} R{\sc ees}
 ({\it Editors\/})} \\
H. A{\sc belson}     &
R. K. D{\sc ybvig}   &
C. T. H{\sc aynes}   &
G. J. R{\sc ozas}    \\
N. I. A{\sc dams iv} &
D. P. F{\sc riedman} &
E. K{\sc ohlbecker}  &
G. L. S{\sc teele} J{\sc r}. \\
D. H. B{\sc artley}  &
R. H{\sc alstead}    &
D. O{\sc xley}	     &
G. J. S{\sc ussman}  \\
G. B{\sc rooks}	     &
C. H{\sc anson}	     &
K. M. P{\sc itman}   &
M. W{\sc and}	     \\
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\em Data and procedures and the values they amass, \\
Higher-order functions to combine and mix and match, \\
Objects with their local state, the messages they pass, \\
A property, a package, the control point for a catch--- \\
In the Lambda Order they are all first-class. \\
One Thing to name them all, One Thing to define them, \\
One Thing to place them in environments and bind them, \\
In the Lambda Order they are all first-class.
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{\bf Keywords:} Scheme, Lisp, functional programming, computer languages.
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{\footnotesize \noindent This report describes research done at the
Artificial Intelligence Laboratory of the Massachusetts Institute of
Technology.  Support for the laboratory's artificial intelligence
research is provided in part by the Advanced Research Projects Agency of
the Department of Defense under Office of Naval Research contract
N00014-89-J-3202 and by the National Science Foundation under grant
number MIP-9001651.
\par}

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With apologies to J. R. R. Tolkien.
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