Order is the meaning of what you do when somthing has already come out and preorder is the opposite when you preorder a game for ex gamestop you get it before it comes out
The order of sharps: F,C,G,D,A,E,B
A good acronym that works for sharps and flats is:(for sharps)
"Father Charles goes down and ends battle"
The for flats:
"Battle ends and down goes Charles...