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+==================
+Scheme
+==================
+
+``mit-scheme`` with the ``scmutils`` package is assumed; the command
+``mechanics`` starts in interactive edwin prompt.
+
+See also notes on `The Little Schemer </k/books/littleschemer/>`__.
+
+Scheme Implementations
+-----------------------
+
+Very partial list, mostly just the ones which are interesting to me.
+
+MIT/GNU Scheme
+ The 7.9.0 release (last stable as of 01/01/2009) is not R5RS compatible,
+ and is generally a pain in the ass to compile on new systems. The 9.0
+ release should be easier to compile and distribute because it will use
+ a C compiler to bootstrap (true?).
+
+SCM
+ SCM is a fairly minimal, very small footprint R5RS-compatible
+ implementation. Apparently very portable and easy to compile. Includes
+ the Hobbit compiler. Part of the GNU project, maintained at MIT?
+
+SIOD
+ SIOD (scheme in one day) is a super small (75k binary?) Scheme
+ implementation.
+
+Coding in ``edwin``
+-----------------------
+
+..note: this section should be spun off as emacs. edwin is essentially a
+ scheme version of emacs. See this
+ `http://static.bryannewbold.com/mirror/sheets/emacs.pdf`:emacs cheatsheet:
+
+Common keyboard commands (usually 'M' is alt button, 'C' is ctrl, and 'S' is
+meta/super/"windows"):
+
+========= ====================================================================
+C-x C-f Open a file, or create a new one
+C-x C-s Save the file
+C-x k Kill (close) a buffer
+C-x C-c Exit the editor
+C-g Abort a command
+C-x C-e Evaluate the previous expression
+M-z Evaluate the surrounding expression
+M-o Evaluate the entire buffer (everything)
+C-c C-c Kill evaluation after an error
+C-y Paste (yank)
+C-x 2 Split screen vertically
+C-x 5 Split screen horizontally
+C-x o Switch to next buffer window
+C-x 1 Return to non-split screen
+M-x Enter a command by name in minibuffer (use tab to complete)
+C-x C-b Show buffer menu
+C-x b Select buffer
+C-x u Undo
+C-y Paste
+========= ====================================================================
+