2.6 Environment Variables

Scheme refers to many environment variables. This section lists these variables and describes how each is used. The environment variables are organized according to the parts of MIT/GNU Scheme that they affect.

Environment variables that affect the microcode must be defined before you start Scheme; under unix or Windows, others can be defined or overwritten within Scheme by using the set-environment-variable! procedure, e.g.

     (set-environment-variable! "EDWIN_FOREGROUND" "32")

• Microcode Environment Variables
• Runtime Environment Variables
• Edwin Environment Variables
• Windows Environment Variables