No Subsurf Under mesh in bottom panel

Ok, Ive been looking at the tutorials and this guy was using a thing called SubSurf to model or something. I looked on my Blender in the Mesh Panel thing and its not there…why?

Start here: http://wiki.blender.org/index.php/Manual

and then go here: http://wiki.blender.org/index.php/Manual/Subsurf

The tutorial you are using was created with an older version of Blender, you might want to work with the newer tutorials to avoid this problem until you understand the differences.
http://wiki.blender.org/index.php/Tutorials#Introduction

And welcome to the Blender forum, hope your enjoying getting to know my favorite application.

thank you very much. that will help alot.
But now i ran into another stitch.

here
http://wiki.blender.org/index.php/Manual/Your_First_Animation_in_30_plus_30_Minutes_Part_I

I found another tutorial. And in it, it tells me to Find the Subdivide Button in the Mesh Panel. Yet again. Its not there.
How can I find it?

thank you very much. that will help alot.
But now i ran into another stitch.

here
http://wiki.blender.org/index.php/Manual/Your_First_Animation_in_30_plus_30_Minutes_Part_I

I found another tutorial. And in it, it tells me to Find the Subdivide Button in the Mesh Panel. Yet again. Its not there.
How can I find it?