System of a Down ? Know
Tabs by mxma1
MAKE SURE to listen to the song first so you know the timing
I am 99% sure this is correct:

Play in Dropped D Tuning
Heavy Distortion Throughout Whole Song

intro A
intro B
intro C
riff A
verse
chorus
riff B
verse
chorus
riff C
riff D
riff E
riff F
riff G
chorus




intro A x4 
E| ---------------
B| ---------------
G| ---------------
D| -0--8--0-0-8-8-
A| -0--8--0-0-8-8-
D| -0--8--0-0-8-8-

intro B x8
E| ---------------
B| ---------------
G| ---------------
D| -0--8--0-0-4-4-
A| -0--8--0-0-4-4-
D| -0--8--0-0-4-4- 

intro C x4(play fast)     
E| -10-10---10-10-10-
B| ------------------
G| ------------------
D| ------------------
A| ------------------
D| ------------------  

riff A x8(play hard)
E| -----------
B| -----------
G| -----------
D| -0---0-0-3-
A| -0---0-0-3-
D| -0---0-0-3- 

verse x16(palm muted)
E| ---------------
B| ---------------
G| ---------------
D| ---------------
A| -4-4--4-4----7-
D| --------------- 

chorus x4(don't play the x's 3th time)
E| ----------------------------------
B| ----------------------------------
G| ----------------------------------
D| -0--2-3--3-3-3--0--2-3-x-x--x--x-x
A| -0--2-3--3-3-3--0--2-3-x-x--x--x-x
D| -0--2-3--3-3-3--0--2-3-x-x--x--x-x

riff B x8(play hard)
E| -----------
B| -----------
G| -----------
D| -0-0--0--3-
A| -0-0--0--3-
D| -0-0--0--3-

riff c x3(heavy palm muted)
E| -------------
B| -------------
G| -------------
D| -x-x--x--x-x-
A| -x-x--x--x-x-
D| -x-x--x--x-x-

riff d x7(play hard)
E| -------------
B| -------------
G| -------------
D| -0-0--0--0-0-
A| -0-0--0--0-0-
D| -0-0--0--0-0-

riff e x4(play slowly. dont play fret 10 on B string 4th time)
E| ------------------
B| ---------------10-
G| ----------10---10-
D| ----------8----8--
A| -0----------------
D| -0----------------

riff f x2(palm muted)
E| ------------------------------------------
B| ------------------------------------------
G| ------------------------------------------
D| ------------------------------------------
A| ------------------------------------------
D| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-

riff g x2
E| ------------------------------------------
B| ------------------------------------------
G| ------------------------------------------
D| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-
A| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-
D| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-