nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
The DOCTYPE is a required preamble for HTML5 websites.
These websites are related to geosystema.net in terms of content, traffic and structure
vingeo.com
gki.com.ua
pcad.ru
delta.lg.ua
vinmap.net
lesis.ru
geoguide.com.ua
bardia-holiday.com