*[https://www.linuxtopia.org/LinuxSecurity/ Linux Security for Beginners] - A free guide on how to secure your Linux system (for the beginner).
*[https://www.linuxtopia.org/LinuxSecurity/ Linux Security for Beginners] - A free guide on how to secure your Linux system (for the beginner).
*[http://www.arrl.org/getting-licensed Getting Licensed] - ARRL Guide to getting your Amateur Radio License
*[http://www.arrl.org/getting-licensed Getting Licensed] - ARRL Guide to getting your Amateur Radio License
+
*[https://en.wikipedia.org/wiki/List_of_amateur_radio_organizations List of Amateur Radio Organizations] - Wikipedia list that provides a links Amateur Radio Organizations all over the world.