Lincoln Cent Errors
There are dozens of types of known Lincoln Cent Errors.  The following list is

Blanks/Planchet
Broadstrike
Brockage
Capped Die
Struck Through Die Cap
Incomplete Planchet "Clip"
Lamination
Off-Center
Rotated Die
Double Strike
Triple Strike
Die Break "Cud"
Die Clash
Double Clash
Defective Planchet
Split Planchet
Bonded Coins
Struck Through
Struck Through Cloth
Unplated Cent