Digital cameras come with on-board memory but the problem is that its not that much usually only 40MB. Digital SLR cameras only come with memory if you buy the camera in abundle deal. Either way your going too need memory too really enhance your photo taking experience.

There are various companies that make memory cards. The only thing that's different is the speed of some cards. Some cards operate faster because they are meant too be used by professionals who are taking a lot of pictures at one time. The size of the memory cards is small they are very tiny things. The capacity of the cards varies but its a good idea too get one that's at least 1GB they capacity is up too 32gb for some cards.