Its inspiration comes from the examples in Sonya Keene's CLOS book.
CL-ENVIRONMENT is available:
- in the CLOCC: http://clocc.hg.sourceforge.net/hgweb/clocc/clocc/file/default/src/port/environment
- in the Debian Package with the name, CL-ENVIRONMENT: https://sources.debian.org/src/cl-environment/
system programming