Back in 1986 Tom Landauer concluded that the human brain can held about 200 megabytes of information. He got this number by estimating the rate at which people take in information and the rate at which people forget things.
And hard drive on my computer is 100 gigabytes! Now you see why title of my blog is "Things to remember"!
With about 6 billion people on Earth the total memory of humans now alive is about 1,200 petabytes. The Library of Congress is about 2-3 petabystes.
As far as processing power goes prof. George Miller estimated that our brain can handle five to nine thoughts at once. Read more about human mind
References:
T. K. Landauer How much do people remember? Some estimates of the quantity of learned information in long-term memory, Cognitive Science, 10 (4) pp. 477-493 (Oct-Dec 1986).
Michael Lesk How Much Information Is There In the World?
Philip and Phylis Morrison The Sum of Human Knowledge?
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