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developed to perform arithmetic operations, square/cube roots
slide counters along rods, wires, or lines within a wood frame
developed around 2,000 years ago and used throughout the Middle East, China, & Russia
Can still be found today throughout the world; also used by those with a visual impairment -
Replacement for papyrus around the 2nd century; became the most widely used and significant advancement for information storage
Typically used sheepskin (parchment) or calfskin (vellum) -
Alessandro Volta created the first battery
comprised of two different metals that were placed in an acid -
Developed by James Ritty & John Ritty
Were capable of expressing values in dollars & cents
Created printed receipts for customers, maintained transaction logs, as well as performing other accounting functions
Embezzlement of cash became more difficult; bell would sound off every transaction -
Peter Brown started the research into the hypertext systems
Allowed for quicker calculations
Stored information on stacks of cards -
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