Desktops and Laptops purchased from manufactures like DELL, IBM, etc comes with a serial number(or service tag) and a model name. If you ever loose this information, then you can use MS DOS commands to retrieve the information

To retrieve serial number of the computer run the following command

wmic bios get serialnumber

To retrieve model name of the computer run the following command

wmic csproduct get name

Read more: http://www.techdreams.org/tips-tricks/find-model-number-and-serial-number-of-your-computer-using-dos-commands/599-20081208

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