Global Variable: *environ*
This variable holds various information about the host environment.
Example:
>> *environ* :: ("TERM_PROGRAM=Apple_Terminal" "SHELL=/bin/bash" "TERM=xterm-color" "TERM_PROGRAM_VERSION=133" "OLDPWD=/Users/ericjordan" "USER=ericjordan" "__CF_USER_TEXT_ENCODING=0x1F5:0:0" "PATH=/opt/local/bin:/opt/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin" "PWD=/Users/ericjordan/mosvm" "HOME=/Users/ericjordan" "LOGNAME=ericjordan" "_=/opt/local/bin/rlwrap")