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.
A terabyte is a measurement of storage capacity on a computer's hard drive. Early on, average home computers held about 20 megabytes; one terabyte is equal to 1,048,576 megabytes. A gigabyte can hold the information equivalent of about 1,000 thick books.