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How much is 299 petabytes?

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It's about 150,000,000,000,000 times as much as a Page of Text.
In other words, the amount of a Page of Text is 0.00000000000000710 times 299 petabytes.
(50 lines, 50 characters per line, ASCII encoding)
A 50-character-per-line, 50-line page of Latin alphabet text requires 0.00000000000220 petabytes when digitally represented. The Google Books project, which has produced hundreds of millions of pages of digital text, used a robotic device to digitize over eight million titles at a rate of about 1,000 pages per second.
It's about 3,000,000,000,000,000 times as much as a Magnetic Stripe Card.
In other words, 299 petabytes is 3,000,000,000,000,000.000000000000000000 times the amount of a Magnetic Stripe Card, and the amount of a Magnetic Stripe Card is 0.000000000000000300 times that amount.
(maximum capacity; per ISO 7811 specification)
The storage capacity of a magnetic stripe on a credit or identification card is about 0.0000000000001000 petabytes. According to legend, Forrest Parry, the IBM engineer who developed the first magnetic stripe card in 1960, was able to solve the problem of adhering the strip to the card after his wife suggested using an iron.