Memory
Then: The first floppy disks were invented by IBM to store data and programs. Floppy disks came in 8 inch, 5 1/4 inch and 3 1/2 inch forms and were used for data storage from the mid-1970’s to the late 1990’s. The floppies held anywhere from 1.44 MB to 6MB worth of data.
Now: A micro SD drive that hold gigs of data can fit conveniently on a keychain.
Computers
Then: One of the earliest computers was ENIAC (Electronic Numerical Integrator and Computer), the first true all-purpose electronic computer. Unveiled in 1946, it was a monstrous 30-ton machine with 6000 switches, 18,000 tubes and cabinets, and occupied an entire room.
Now: Take your pick — super slim laptops, ultra light Netbooks, iPhones or iPads.
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