3f5ec661_istrator_s_Security_Guide___IV__Name_of_Media
[Pro's] Not susceptible to EMP, and everyone in the developed world has a CDROM drive. Media is also pretty sturdy and cheap ($2 USD per 650 Megs or so) [Con's] CDROM's do have a finite shelf life of 5-15 years, and not all recordables are equal. Keep away from sunlight, and make sure you have a CDROM drive that will read them. [Name of Media] 
CDROM
H a r d D r i v e
C D R O M
T a p e
F l o p p i e s
Z i p D i s k s
J a z z D r i v e s
S y Q u e s t
L S 1 2 0
P r i n t e r
Suresh Kumar Pakalapati's Linux Administration: Linux Administrator's Security Guide - IV
Name of Media