| - Network: Firewall, Router, Switch, Cisco, H3C, Juniper,F5
					Big-IP, Array | 
| - OS: Linux, FreeBSD, CentOS, Redhat, Ubuntu, Debian | 
| - Security: OpenVPN, L2TP, PPTP, IPSec IP Tunnel | 
| - Cluster: SmartDNS, LVS, HAproxy, Keepalived, Heartbeat,
					MooseFS, GlusterFS | 
| - Web App: Apache, Lighttpd, Nginx, Tomcat, Resin | 
| - Web Dev: DIV-CSS, JQuery, Prototype, DSSSL, SGML, XML,
					DocBook, Google Map API
				 | 
| - Cache: APC Cache, XCache, Memcached, Squid, Varnish | 
| - Database: PostgreSQL, MySQL Cluster, MySQL Replication,
					Cassandra, MongoDB | 
| - PHP Frameworks: CodeIgniter, Prado, Mach II, Qcodo, Smarty
				 | 
| - Python Frameworks: Django, Pylons | 
| - Perl Frameworks: Catalyst  | 
| - Search Engine: Solr, Sphinx, Crawler: Nutch | 
| - Virtualization: Xen, Kvm, OpenVZ |