Under unix, MIT/GNU Scheme is invoked by typing
at your operating system's command interpreter. Under Windows, MIT/GNU Scheme is invoked by double-clicking on a shortcut. In either case, Scheme will load itself and print something like this:
Copyright (C) 2011 Massachusetts Institute of Technology This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Image saved on Sunday May 1, 2011 at 4:38:16 PM Release 9.1 || Microcode 15.3 || Runtime 15.7 || SF 4.41 || LIAR/x86-64 4.118 Edwin 3.116
This information, which can be printed again by evaluating
tells you the following version information. `Release' is the release number for the entire Scheme system. This number is changed each time a new version of Scheme is released. `Microcode' is the version number for the part of the system that is written in C. `Runtime' is the version number for the part of the system that is written in Scheme.
Following this there may be additional version numbers for specific
subsystems. `SF' refers to the scode optimization program
sf; `LIAR/ARCH' is the native-code compiler, where
ARCH is the native-code architecture it compiles to;
`Edwin' is the Emacs-like text editor. There are other
subsystems you can load that will add themselves to this list.