Classes of Mutual Funds 
Class A Share Mutual Funds:
 a class of mutual fund share issued with a front-end sales load. 
Class B Share Mutual Funds:
 a class of mutual fund share issued with a back-end sales load. 
Class C Share Mutual Funds:
a class of mutual fund share issued with a level load, annual charges set at a fixed percentage. 
Types of Sales Load in Mutual Funds
Back-end Load:
a commission or sales fee that is charged when mutual fund shares are redeemed.  
Front-end Load:
a mutual fund commission or sales fee that is charged at the time shares are purchased.