On Thu, Oct 8, 2015 at 12:38 PM, Taylan Ulrich Bayırlı/Kammer <xxxxxx@gmail.com> wrote:
 
Besides, it seems that MS Windows supports environment variables, and
surely all Unixes do.  The systems you have in mind must be rather
obscure then?

Tiny embedded systems, for example.  Mostly environment variables just feel like something that should be outside the scope of Scheme specs.