Actually electronics VCR are not commonly used any more, but it's still possible to find information on them. A good place for example would be "HowStuffWorks" (here one has to check the dedicated "VCR" page in section "Electronics").
There are a number of websites that offer information about speaker electronics. One can find out more on sites such as 'How Stuff Works', 'Wikipedia' and 'Pioneer Electronics'.
One can find information about the company Directed Electronics from their website, Ripoff Report, and Amazon. Directed Electronics is a designer and marketer of brand car alarms and remotes in the United States.
One can find information on ultraportable laptops at any electronics supplier, or big name franchise with a decent electronics section. The maker of the laptop may also have information.
If one is interested in finding information about Emerson electronics one can access the company website. The site offers a wealth of information about the company as well as numerous news articles.
One can find information on time constant online at various websites. One can find information about time constant at websites such as Wisc-Online, Learn About Electronics, and Ladyada.
One can find information about a Universal Serial Bus memory pen directly from TigerDirect. You can also get information from electronics stores such as Best Buy.
One can find information on the best mp3 player at your local Best Buy or electronics store. They can provide you with that information and lead you in the right direction.
One can find information about printer cables at Staples, Best Buy and other stores who specialize in electronics. You can also find information about cables on sites like Amazon and Newegg.
One can find information about the Dick Smite website directly from the website itself. They are an online store that mainly has deals on electronics.
To find out information about radios and electronics, one should check with a local electronics store and speak to a trained salesperson. One can also find quite a bit of information on sites ranging from Wikipedia for general information to specialty sites like Antique Radio or Stone Vintage Radio for antiques and collectibles, NOAA's Storm Aware for weather radios, Fun With Radios for scanner radios, or Ham Radio for amateur radio broadcasting.
One can find information about electronics manufacturing from: Wikipedia, Cnet, CTS Corps, Circuit World, iNEMI, 3M, AESCO, Deity Government, Intellect UK, CZ Electronics, World Scientific, Altadox, to name a few.
One can find information for a Samsung i730 on the Samsung website. An alternative would be to look into a technology magazine or go to a sales representative at an electronics store.