I hope the summary will be helpful to my friends who just learned ASP.
1: all_http
2: all_raw
3: appl_md_path
4: appl_physical_path
5: auth_password
6: auth_type
7: auth_user
8: cert_cookie
9: cert_flags
10: cert_issuer
11: cert_keysize
12: cert_secretkeysize
13: cert_serialnumber
14: cert_server_issuer
15: cert_server_subject
16: cert_subject
17: content_length
18: content_type
19: gateway_interface
20: https
21: https_keysize
22: https_secretkeysize
23: https_server_issuer
24: https_server_subject
25: instance_id
26: instance_meta_path
27: local_addr
28: logon_user
29: path_info
30: path_translated
31: QUERY_STRING
32: remote_addr
33: remote_host
34: remote_user
35: request_method
36: script_name
37: SERVER_NAME
38: server_port
39: server_port_secure
40: server_protocol
41: server_software
42: URL
43: http_accept
44: http_connection
45: http_host
46: http_user_agent
47: http_cookie
48: HTTP ________________
49: http_accept_charset
50: http_keep_alive
