The chainsaw chain can be broken up into 3 categories.

1) Safety Chain or Reduced Kickback chain:  Reduced Kickback chain has large safety rakers that don't allow the chain to get as much of a bite.  This chain is great to the person who wants to trim up some trees or use the saw once in a while.  I will also recommend the chain for any novice chainsaw operators.  Although reduced kickback chain will not prevent all kickbacks, it will reduce them and help with the severity.  This is good home owner chain.

2) Semi-Chisel Chain:  The semi-chisel chainsaw chain is what you will want to use for cutting firewood for a house or two.  This chain is usually a little safer than Full Chisel, but usually has very little safety rakers if it has any at all.  I might call this semi professional chain.

3) Full-Chisel Chain:  This is straight up professional chainsaw chain.  Mostly used for logging and cutting the trunk of the tree.  Don't use this unless you know what you are doing.  Full-chisel has NO safety rakers at all.  It will get a full bite and really chew through the wood.  This chain will also dull faster in the hands of a novice or in poor cutting conditions.