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 C (CGCFAD) 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 
D| ---------------
A| ---------------
F| ---------------
C| -0--8--0-0-8-8-
G| -0--8--0-0-8-8-
C| -0--8--0-0-8-8-

intro B x8
D| ---------------
A| ---------------
F| ---------------
C| -0--8--0-0-4-4-
G| -0--8--0-0-4-4-
C| -0--8--0-0-4-4- 

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

riff A x8(play hard)
D| -----------
A| -----------
F| -----------
C| -0---0-0-3-
G| -0---0-0-3-
C| -0---0-0-3- 

verse x16(palm muted)
D| ---------------
A| ---------------
F| ---------------
C| ---------------
G| -5-5--5-5----8-
C| --------------- 

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

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

riff c x3(heavy palm muted)
D| -------------
A| -------------
F| -------------
C| -x-x--x--x-x-
G| -x-x--x--x-x-
C| -x-x--x--x-x-

riff d x7(play hard)
D| -------------
A| -------------
F| -------------
C| -0-0--0--0-0-
G| -0-0--0--0-0-
C| -0-0--0--0-0-

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

riff f x2(palm muted)
D| ------------------------------------------
A| ------------------------------------------
F| ------------------------------------------
C| ------------------------------------------
G| ------------------------------------------
C| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-

riff g x2
D| ------------------------------------------
A| ------------------------------------------
F| ------------------------------------------
C| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-
G| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-
C| -0-0-0--0-0-0--0-0-0--3-3-3--3-3-3--3-3-3-