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) 2015 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 Wednesday November 25, 2015 at 3:49:35 PM Release 9.2.1 || Microcode 15.3 || Runtime 15.7 || SF 4.41 || LIAR/i386 4.118
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.