Hi Jaena and welcome to the Q&A Board!
You just need to buy a memory card reader that accepts a Secure Digital card, the type of memory card that your camera uses. Plug the reader into the USB port of your computer. Depending on your operating system, you may have to install a driver for the card. For some operationg systems, such as Windows ME or XP, no driver is required. The driver either comes with the card reader or can be downloaded from the manufacturer's website.
Here's more information about Memory Card readers:
http://www.digicamhelp.com/memory-cards/memory-card-readers.htm