Some possible command interpreter types and their meanings are:
-\[Evaluator] read-eval-print loop for evaluating expressions
-\[Debugger] single character commands for debugging errors
-\[Where] single character commands for examining environments
+[Evaluator] read-eval-print loop for evaluating expressions
+[Debugger] single character commands for debugging errors
+[Where] single character commands for examining environments
Starting with release 6.2 of Scheme, the latter two types of command
interpreters will change the major mode of the Scheme process buffer