Please help me identify this engine part!
 

I hope someone can help me. Today while driving my 1991 Hyundai Excel,
when turning the wheel left or right it was very difficult, and very
noisy. I was close to home so I drove home. After an hour or so I
checked on the car. There was a huge leak of power steering fluid under
the car. I assume the power steering pump went out. I added power
steering fluid and started the car and I could see the fluid running out
of what I believe is the power steering pump. Can someone verify that it
is definitly the power steering pump. I took a photo. In the photo I'm
pointing at the area that is leaking. (right behind the wheel of what I
believe is the pump)

http://i4.tinypic.com/2upz8uu.jpg

Can I drive this 3 or 4 miles to the auto shop tomorrow if I fill it
with oil before leaving, or should I just have it towed? Could I really
screw it up worse if I drive it? Thanks so much for any help! Thank
you! Pam