Difference between a Dust Storm and a Tornado

[LightbulbSun]

If a tornado is identified as a violent column of air, then what is the difference between a tornado and a dust storm (or I should be saying a dust twister)?

 

[matthyaouw]

Google
knows
all.

 

[edward]

A (dust twister)? is really a whirlwind or here in the Southwest a dust devil.

http://en.wikipedia.org/wiki/Dust_devil