Have you ever been asked for your computer's serial number? How about for some of your other electronic devices? If you have, you probably already know what I'm talking about, but if you haven't, allow me to fill you in!
These days, every computer, every device, has its own serial number. The serial numbers are mainly used for inventory purposes, but they also help with identification. For example, if you're having trouble with your computer and you are talking to your manufacturer's technical support, they may ask you for that number, because it helps them to identify what type of computer you have. They can then use that information to help you in a more detailed manner. Your manufacturer can also use that number to order replacement parts, or a new computer if necessary. The same goes for other devices you may use with your computer as well.
For most pieces of hardware (including your computer, printer, etc.), the serial number can be found either on the bottom or on the back of the device. For most PCs, it's usually on the bottom of the computer tower or on the bottom of a laptop. Of course, each computer is different, but you should be able to find your number in that general area. Now, most software programs also come with serial numbers, which you are probably more familiar with. Those numbers can usually be found on the actual CD or on the CD's casing.
So, the next time you have a sighted person around, have them look for your serial numbers and write them down in an accessible format. Remember too that these numbers are usually very small, it may be helpful to have some kind of magnification device around to help your sighted friend.