https://padlet.com/paulwang273/mni5a67xgxnml3gb Made with Padlet en-us 2021-04-08 14:27:03 UTC 2025-09-30 10:57:52 UTC hello@padlet.com paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401759268 Beads on rods to create a calculator/counter]]> 2021-04-09 23:35:33 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401759268 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401759604 Based on Napier's rules for logarithms]]> 2021-04-09 23:35:52 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401759604 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401762004 The Jacquard Loom was the first stored program. It used metal cards.]]> 2021-04-09 23:38:23 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401762004 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401764975 The Charles Babbage was a difference engine, a calculating machine. It also stored numbers on metal punch cards, accurate to 6 decimal places, and powered by speed.]]> 2021-04-09 23:41:26 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401764975 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401858713 1st generation computers used Vacuum Tubes to protect circuitry ]]> 2021-04-10 01:19:07 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401858713 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401881356 The first computer bug was a moth stuck in the relay switch. Grace Hopper called it debugging a computer.]]> 2021-04-10 01:43:54 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401881356 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401884338 The first transistor used silicon and won Nobel prize with an on and off switch.]]> 2021-04-10 01:47:30 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401884338 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401887270 2nd Generation computers replaced vacuum tubes with transistors ]]> 2021-04-10 01:50:59 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401887270 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401894454 The first fully electronic digital computer built in the U.S., Created at the University of Pennsylvania, weighed 30 tons, contained 18,000 vacuum tubes, and costed $487, 000 ]]> 2021-04-10 01:59:05 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401894454 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401896524  3rd Generation computers used Integrated Circuits that were made of transistors, resistors and capacitors integrated into one chip.]]> 2021-04-10 02:01:29 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401896524 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401901611 4th Generation computers had  microchips. Intel 4004 Microchip had 2,250 transistors ]]> 2021-04-10 02:07:31 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401901611 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401909180 It had 256 bytes of memory, 2 MHz Intel 8080 chip, and cost $395—$495 ]]> 2021-04-10 02:16:11 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401909180 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401910387 It was the first wide-selling personal computer, had 8088 microchip 29, 000 transistors, 256 K RAM, and one or two floppy disk drives.]]> 2021-04-10 02:17:40 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401910387 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401913547 released Apple II computer that was used in most schools.  Was the first commercial computer with Graphic User Interface GUI and Mouse]]> 2021-04-10 02:20:52 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401913547 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401916352 By then, computers were in most homes, were faster and less expensive, and Windows 95 was the 1st decent GUI.]]> 2021-04-10 02:23:43 UTC https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401916352 paulwang273 https://padlet.com/paulwang273/mni5a67xgxnml3gb/wish/1401917713 There was a great increase in speed, storage, and memory, Networking and Internet Capabilities, and better CD Drives. Cell phones and wireless technology also appeared.

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