what site can we find the timeline of Electronics and electrical devices?
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http://www.greatachievements.org/?id=3956
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A brief internet history \n\nhttp://www.isoc.org/internet/history/brief.shtml
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The manufacturers website?
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try finding the information on this website
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http://en.wikipedia.org/wiki/Transistor\n\nIt's a big subject, at that is just a start.
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http://www.bell-labs.com/\n\nhttp://en.wikipedia.org/wiki/Bell_Labs
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you could try the site listed below.
643966
I know one website it is  howstuffworks.com  where you can get almost all information related science, engineering, & technology too. There are thausands of sites related to science while searching through Google you can get some more also.
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Here's an interesting page about early PC's. Keep scrolling down when the page opens.  It's rather interesting. \nhttp://www.blinkenlights.com/pc.shtml\n\nAnd, here's Wiki's entry:\nhttp://en.wikipedia.org/wiki/History_of_computing_hardware
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I've listed a link below with some history on it - hope this helps.
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http://en.wikipedia.org/wiki/Bipolar_junction_transistor
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TIME's 50 Best Websites:\nhttp://www.time.com/time/techtime/200306/intro.html
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Try here:\n\nwww.eej.com
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This site has a timeline of everyday inventions; it covers more than the fifty years you want, but it is fairly short and there seems to be some other useful information on the site.\n\nhttp://www.factmonster.com/ipka/A0768871.html
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Maybe www.wikipedia.com
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http://www.humbul.ac.uk/output/byheading.php?sub=history
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... and here is an easy to follow timeline dealing with the creation of the internet.\n\nhttp://www.zakon.org/robert/internet/timeline/\n\nCheers!