2.1 Basics of Starting Scheme

Under unix, MIT/GNU Scheme is invoked by typing

mit-scheme

at your operating system’s command interpreter. In either case, Scheme will load itself and print something like this:

Copyright (C) 2019 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 Tuesday May 26, 2020 at 10:23:04 PM
  Release 10.90 || SF || LIAR/x86-64

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.

Following this there may be additional names 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.