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compspecs - Brief History of Computers Brief Abacus 40s-50s...

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Unformatted text preview: Brief History of Computers Brief Abacus 40s-50s room-sized computers, punch card, 40s-50s tapes, hot (vacuum tubes), expensive, limited power, military use then education power, Personal computer Tube to transistor to integrated circuits to chips John Bardeen, U of I, transistor, Nobel Prize 1956 Smaller, more powerful, cheaper, apps beyond math, Smaller, science and military science Growth–ease of use, Mac/Win graphical interface, Growth–ease Internet, email communication Internet, Impact of computers Impact Will Daggett, Futurist Agrarian to Industrial to Information Age Agrarian–Work not defined by time, worked at home, Agrarian–Work knew all jobs knew Industrial–Work defined by time, specialization, went Industrial–Work to office or factory to Information–Work not defined by time, can work at Information–Work home, know all jobs home, Half of jobs today could be done at home, i.e. online Half banking, travel agent, tech support from India banking, Jobs “sold” to other countries where labor is cheap Most new growth will be small companies Terms Terms Platform–Macintosh, Windows OS Operating System Windows Vista, Windows XP.. Mac OS X ~ compatibility with OS 9?? Mac Linux Software Office 2007 AppleWorks Bits, Bytes and more Bits, bit bit b byte K or KB kilobyte MB megabyte GB gigabyte TB terabyte 1 (on or off, binary) 8 bits Letter A 1000 bytes 1 page 1,000,000 bytes novel 1,000,000,000 bytes 1000 novels 1,000,000,000,000 bytes a library of books Petabyte – 1,000,000,000,000,000 bytes Exabyte – 1,000,000,000,000,000,000 bytes Storage Devices–Capacity Storage 1.4 MB Floppy disk * obsolete? 1-4 GB USB drive (thumb, jump) 100-250 MB Zip disks * obsolete? 640 MB CD-ROM 4500 MB/4.5GB DVD-ROM Computer Selection Criteria Computer What programs and activities will you use? Laptop vs. desktop Operating system Macintosh/Windows Processor brand and Speed GHz (Intel, AMD) RAM (random access memory) GB Hard Drive space in GB Graphics/Sound CD/DVD drives read/write, tape backup Ethernet/Modem/Wireless (speed) More considerations More Keyboard/mouse~optical/trackpad Monitor size/resolution pixels, dot pitch Flat/LCD Speakers, microphone, web cam External, integrated Software bundle Warranty/Tech support Peripherals Peripherals Printer–Inkjet or laser Color/B&W Scanner/fax/copier/printer or multifunction External drives–hard drive, USB Digital camera–still or video/camcorder Video projector PDA–Interface to computer Scan converter/Television Smart Board Adaptive technology–Touch screen, speech Moore’s Law Moore’s Computer power doubles every 18 months Prices are reduced by half Information doubles Any program will expand to fill available memory. ­ Laws of Computer Programming, V Ian Jukes–www.inforsavvy.com Old technology….Apple IIe chip Computer wisdom Computer Technology is not THE answer. It is one of the Technology tools teachers, students and parents may use. tools Anyone who tells you computers are more Anyone effective than anything else is either dumb or lying."-- Larry Cuban, professor, Stanford University, Time, March 2, 1998 Time, Computers make it easier to do a lot of things, but most of the things they make it easier to do don't need to be done. Andy Rooney To err is human, but to really foul things up you need a computer. ­ Paul Ehrlich ...
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