What are the differences between SD and MMC memory cards?

used in digital camera?

480/7-21

Without more information the two citations below should give some information. I use SD and am very happy with the storage capabilites, and the data transfer speed.

MMC
http://en.wikipedia.org/wiki/Multimedia_...

SD
http://en.wikipedia.org/wiki/Secure_Digi...

heey! ive answered one of you questions before i remember the triangle thingie!! lol sorry idk about this one but i just thought that was kool!