nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Websites using https protocol.
The DOCTYPE is a required preamble for HTML5 websites.
These websites are related to sapers.pl in terms of content, traffic and structure
saper.pl
stgambit.com
sappedia.org
forumsap.pl
script4admin.com
akademia-erp.pl
netpedia.com.pl
bcc.com.pl