“ENIAC was completed in 1945 and is regarded as the first successful, general digital computer. It weighed more than 27,000 kg (60,000 lb), and contained more than 18,000 vacuum tubes…” (60,000 lbs = 30 tons)

http://www.ideafinder.com/history/inventions/comeniac.htm

“Computers in the future will weigh no more than 1.5 tons.” (1.5 tons = 3000 lbs (1364 k))

Popular Mechanics, 1949

“UNIVAC – 1951. The world’s first commercial computer began use on June 14, 1951. UNIVAC weighed eight tons…” (8 tons = 16,000 lbs(7300 k))

http://www.digicamhistory.com/1950s.html

“To use the EDSAC, one would program an application using a punch card. The punch card would be read by the EDSAC and then the data transferred to its two ton mercury delay lines, which were capable of holding a whopping 1.44 megabytes of memory after their expansion in 1952…” (2 tons = 4000 lb (1818 k)(two tons for the memory alone!))

http://uncyclopedia.wikia.com/wiki/EDSAC

iPhone 4S– 2011  specs: 64 GB (64 GB = 65,534 megabytes), Weight: 4.9 ounces (140 grams)

http://www.apple.com/iphone/specs.html

“ISKCON brahmanas in the future will only consume milk products from protected cows.”

Madhava Gosh, 2011

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