Part and Color Combination Code (PCC Code) is BrickLink's name for the Element ID used by the LEGO Group to identify a specific part in a specific color. PCCs can be found in the parts list in set instructions after 2007. This number is unique for a part and color combination and should not be confused with an item number, which is a unique number of the mold.
The same part in the same color can have up to 10 PCCs in the BrickLink system. These may be viewed on any catalog entry for parts by clicking the Color Images link in the vertical scrollbar to the left of the image display. It is also possible to search the catalog with a PCC number to locate the specific part and color combination.