Here
This is a list of environment variables that I scrounged up years ago. I no longer have any idea where they came from, or if the pages I got them off of used copious amounts of vaseline to convince people like me, back then, that they mean something useful. Whatever. The real deal for this server, right now, is nearer to the bottom of this page. 

          SERVER_SOFTWARE   : Apache
          SERVER_NAME       : www.tomki.com
          SERVER_VERSION    : 
          SERVER_PROTOCOL   : HTTP/1.1
          SERVER_PORT       : 80
          GATEWAY_INTERFACE : CGI/1.1
          REQUEST_METHOD    : GET
          PATH_INFO         : 
          PATH_TRANSLATED   : 
          SCRIPT_NAME       : /cgi/env.cgi
          SCRIPT_FILENAME   : /custdata01/tomki/public_html/cgi/env.cgi
          DOCUMENT_ROOT     : /custdata01/tomki/public_html
          QUERY_STRING      : 
          REMOTE_HOST       : 
          REMOTE_ADDR       : 216.73.216.135
          REMOTE_USER       :  (shown only if script is in authenticated directory tree
          REMOTE_IDENT      : 
          AUTH_TYPE         : 
          CONTENT_TYPE      : 
          CONTENT_LENGTH    : 
          HTTP_ACCEPT       : */*
          HTTP_HOST       : www.tomki.com
          HTTP_USER_AGENT   : Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
          HTTP_REFERER      : 
          HTTP_COOKIE       : 
          HTTP_FORWARDED    : 
          HTTP_PROXY_CONNECTION     : 
          HTTP_HEADER       : 
          ANNOTATION_SERVER : 
          RESTART           : 
          STATUS            : 
          SEVERITY          : 
          P1                : 
          P2                : 
          P3                : 
          P4                : 
          P5                : 
          P6                : 
          P7                : 
          P8                : 
          TIME_YEAR         : 
          TIME_MON          : 
          TIME_DAY          : 
          TIME_HOUR         : 
          TIME_MIN          : 
          TIME_SEC          : 
          TIME_WDAY         : 
          TIME              : 

  VM-Specific? (2.1)
          X_AUTH_PRIVATE_INFO        : 
          X_AUTH_VERIFIED            : 
          X_PATH_TRANSLATED_OUTCOME  : 
          X_SCRIPT_NAME_TRANSLATED   : 
          X_SERVER_SCHEME            : 

  Apache-specific?
          API_VERSION       : 
          THE_REQUEST       : 
          REQUEST_URI       : /cgi/env.cgi
          REQUEST_URL       : 
          REQUEST_FILENAME  : 
          IS_SUBREQ         :
These are the variables actually used on THIS server
VariableValue
PATH /usr/local/jdk/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/bin:/usr/X11R6/bin:/root/bin:/opt/bin
HTTP_ACCEPT_ENCODING gzip, br, zstd, deflate
SERVER_PORT 80
REMOTE_PORT 58289
HTTP_CACHE_CONTROL max-age=259200
CONTEXT_DOCUMENT_ROOT /custdata01/tomki/public_html
SERVER_SOFTWARE Apache
SCRIPT_NAME /cgi/env.cgi
SERVER_NAME www.tomki.com
HTTP_HOST www.tomki.com
HTTP_ACCEPT */*
REQUEST_METHOD GET
SERVER_SIGNATURE
REQUEST_SCHEME http
SERVER_PROTOCOL HTTP/1.1
SCRIPT_URI http://www.tomki.com/cgi/env.cgi
DOCUMENT_ROOT /custdata01/tomki/public_html
SERVER_ADDR 207.135.98.11
SCRIPT_URL /cgi/env.cgi
QUERY_STRING
REMOTE_ADDR 216.73.216.135
TZ America/Los_Angeles
HTTP_X_FORWARDED_FOR 10.3.58.166
SERVER_ADMIN webmaster@tomki.com
HTTP_CONNECTION keep-alive
CONTEXT_PREFIX
HTTP_USER_AGENT Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP_VIA 1.1 squid-proxy-5b5d847c96-tzhdq (squid/6.10)
REQUEST_URI /cgi/env.cgi
UNIQUE_ID aU_5zpPYvnashbRG1JRDoAAAAAw
SCRIPT_FILENAME /custdata01/tomki/public_html/cgi/env.cgi
GATEWAY_INTERFACE CGI/1.1