What is the difference between a Grand Unified Theory and a TOE?

[49ers2013Champ]

Have weak nuclear, strong nuclear, and electromagnetism all been unified? If so, is that the GUT? And is it that unifying those forces with gravity would lead to a TOE?

Thanks. I'm just getting a little confused.

 

[mikeph]

GUT = unify strong, weak and electromagnetic interactions
TOE = unify GUT with the gravitational interaction