- * **Frameworks and APIs**: POSIX, Qt, Gtk, STL, Boost, WIN32, MFC
- * **Programming Techniques**: OOP, generic programming, metaprogramming, real-time, event-driven, multithreading
- * **Development Tools**: GCC toolchain, GNU make, auto-tools, MSVC, XCode, Codewarrior, IAR, Code Composer Studio, BSO Tasking
- * **Version Control**: Git, Subversion, CVS, Rational Clearcase, Source Safe
+ * **Frameworks and APIs**: POSIX, Qt, Gtk, STL, Boost, WIN32, MFC, Berkeley sockets and TCP/IP
+ * **Programming Techniques**: OOP, template metaprogramming, generic programming, real-time systems, event-driven design, multithreading
+ * **Development Tools**: GCC toolchain (contributor), MSVC, XCode, Codewarrior, IAR, Code Composer Studio, BSO Tasking
+ * **Version Control**: Git, Subversion, CVS, Rational Clearcase, Source Safe, Perforce
+
+ * **Systems administration**: XEN, KVM, Libvirt, Puppet, Nagios, Munin
+ * **Server software**: BIND, DHCP, Exim, Qmail, Postfix, Apache, MySQL, PostgreSQL, Asterisk
+ * **Networking**: TCP/IP, IPv6, DNSSEC, BGP routing