OLL is the 3rd step in the CFOP method for solving the 3x3, it stands for Orient Last Layer. The beginner version, 2-Look OLL, has two main sets of algorithms. First, EOLL to orient the edges, then COLL, to orient the corners.
Dot Shape
F R U R' U' F' f R U R' U' f'
L Shape
f R U R' U' f'
Line Shape
F R U R' U' F'
Sune
R U R' U R U2 R'
Antisune
R U2 R' U' R U' R'
H
R U R' U R U' R' U R U2 R'
Pi
R U2 R2 U' R2 U' R2 U2 R
U
R2 D R' U2 R D' R' U2 R'
T
r U R' U' r' F R F'
L
y F' r U R' U' r' F R