Toshiba laptops often don’t have the model identified anywhere except on the sticker on the bottom, and the lettering on it typically gets worn away in short order. When you need to check for updated drivers, or buy memory, or any other task which requires the model number, you’re left wondering “I think it’s an A505-something. Or maybe it was L305-something. Or something else?” What do you do? Do you try to find the original paperwork? Do you guess?
There is a way to find out the model number that doesn’t require rooting through the filing cabinet or getting out of your chair, or any of that thought or real effort stuff. Here’s how it’s done on a Windows OS…
Open a command box in Windows (WIN+R, “cmd“, press Enter) and type in the following command:
“wmic bios get serialnumber”
(without the quotes, of course). This will cause the Windows Management Instrumentation Command interface to dutifully return the serial number of your computer, as stored in the BIOS. (Linux users can use dmidecode or lshw.)

This works on any computer with the serial number stored in the BIOS, not just Toshiba machines.

So now that you have the serial number, how can you determine the model? Browse to the Toshiba support site ( http://support.toshiba.com/ ) and enter your newly-found serial number into the “Enter model or serial number” box. The website will look up your model from the serial, and presto! You now have your full model number code.