2.1 Basics of Starting Scheme

Under unix, MIT/GNU Scheme is invoked by typing

     mit-scheme

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) 2014 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 Friday May 16, 2014 at 10:35:55 PM
       Release 9.2 || 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

     (identify-world)

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.