Difference between S&M and BDSM?

I hope I don't offend anyone for any reason by asking the difference between the two. I just see these terms here and I don't quite know what exactly they are.
Now, I do know what BDSM is a little bit (though what I know is pretty plain/vanilla). I just know both of those terms deal with fetishes, if I'm correct on that. I'd just like to know what the difference is? Are they at all related to one another?

Again, I hope me putting them together isn't ignorant or offends. I'm just basically curious and know I can get an answer here. less

Read this it has some good explanations. Here is a bit of info.

"BDSM really stands for three separate things...

B&D - Bondage & Discipline - being restrained in some way for being bad/good or for training and conditioning. This can be seen in what is called "pony play." One person is bound in (usually) leather, maybe a type of bit gag while being led around an "arena" forced to pick the feet up high or face a snap of the riding crop.

D&S - Dominance & Submission - One (or more) person controlling another (or many.) This could be as simple as making someone push your cart while you do your shopping. It could be as deep as someone being complete control over another person in every possible way; when they eat, drink, use the restroom, sleep, what they wear... everything. (called 24/7 power exchange.)

S&M - Sadism & Masochism - A sadist is a person who gets their kicks (no pun intended) by inflicting pain on someone, either physical or mental. This could be as simple as telling someone they are useless and do not deserve to be in your presence to applying cloth-pins to all parts of another's body and yanking them off one at a time. A Masochist is a person who gets their kicks by receiving physical or mental pain. Any thing from being humiliated (scolded)in public to being severely whipped or spanked. This is a deeper form of Dominance and Submission.

Hope this helps you better understand what BDSM is all about." less

Read this it has some good explanations. Here is a bit of info.

"BDSM really stands for three separate things...

B&D - Bondage & Discipline - being restrained in some way for being bad/good or for training and conditioning. This can be seen in what is called "pony play." One person is bound in (usually) leather, maybe a type of bit gag while being led around an "arena" forced to pick the feet up high or face a snap of the riding crop.

D&S - Dominance & Submission - One (or more) person controlling another (or many.) This could be as simple as making someone push your cart while you do your shopping. It could be as deep as someone being complete control over another person in every possible way; when they eat, drink, use the restroom, sleep, what they wear... everything. (called 24/7 power exchange.)

S&M - Sadism & Masochism - A sadist is a person who gets their kicks (no pun intended) by inflicting pain on someone, either physical or mental. This could be as simple as telling someone they are useless and do not deserve to be in your presence to applying cloth-pins to all parts of another's body and yanking them off one at a time. A Masochist is a person who gets their kicks by receiving physical or mental pain. Any thing from being humiliated (scolded)in public to being severely whipped or spanked. This is a deeper form of Dominance and Submission.

Hope this helps you better understand what BDSM is all about." less