Band: System of a down
Song: Old school Hollywood 
I think the tuning is the same as most of systems songs: CGCF

intro
|---------|
|---------|
|---------|Repeat 4x
|-1/5~----|

|-------------------| 
|-0-5-7-5-8-5-7-5---|
|-------------------| then do this 8x
|-------------------| 

  chorus
|----------------------------------------------------------------|
|----------------------------------------------------------------|
|----------------------------------------------------------------|
|-0-5-7-5-8-5-7-5-0-5-7-5-8-5-7-5-0-5-7-5-8-5-7-5-0-5-7-5-8-7-5-3|

|----------------------------------------------------------------|
|----------------------------------------------------------------|
|---------5---3--------------------------------------------------| x 
|-1---1-----------0---0---4---7----------------------------------|

  verse
|-0h5-7p5-8p5-7p5-------------------|
|------------------0h5-7p5-8p5-7p5--|
|-----------------------------------|
|-----------------------------------|

pre-chorus
|----------------------------------------------------------------|
|----------------------------------------------------------------|
|-6-6-6-6-6-6-6-6-5-5-5-5-5-5-5-5-6-6-6-6-6-6-6-6-8-8-8-8-8-8-8-8|
|----------------------------------------------------------------| x2

 bridge
|-8-8-8-8-8-8-8-8-7-7-7-7-7-7-7-7-8-8-8-8-8-8-8-8----------------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||

|-10-10-10-10-10-10-10-10-8-8-8-8-8-8-8-8-7-7-7-7-7-7-7-7--------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||

|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10||
|----------------------------------------------------------------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||

|10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-----------------||
|----------------------------------------------------------------||
|----------------------------------------------------------------||

 outro
|------------------------------------------------||
|------------------------------------------------||
|------------------------------3/5-3-------------||
|-00-55-77-55-88-77-55-33--1-1--------0-0--44-7--||

That’s it, most of it I am sure about but if not correct me.  BYE!!! ;)