The National Research Council (2002) associates the indicators of self-management (self-control, perseverance, stress management and goal-setting) with personal and social assets that facilitate positive youth development in the area of psychological and emotional development.
A Petabyte is approximately 1,000 Terabytes or one million Gigabytes. It's hard to visualize what a Petabyte could hold. 1 Petabyte could hold approximately 20 million 4-door filing cabinets full of text. It could hold 500 billion pages of standard printed text.
(Six nines of reliability - 99.9999% over 10). To translate into real world costs, here's an example of storing one petabyte, with six nines of reliability (99.9999%). This also assumes the cost per terabyte is a commodity and the same for either a RAID-6 and replication or Dispersal solution, and set at $1,000.