J.K. Rowling hasn't told us everything about the Harry Potter universe. We've filled in some blanks ourself here for the sake of playability. We've also created some house rules about some Wizarding technology and magic. All of this information has been collected here for easy reference.

COMMUNICATION: How wizards get in touch with each other.
MEDICINE: How it works. Includes an injuries guide to aid you in RPing injuries realistically.
MONEY: Wizarding cash and how it relates to Muggle money.
RUNES: Using them thematically and reasonably.
SEERS: IC and OOC realities to playing Seers on Hogwarts Express.
SPELLS: Our house rules relating to some common spells.
TRANSPORTATION: How to get around.
WEAPONS: Which are appropriate and which are not.

Although it is not available in the newsfiles on the game, we have also provided a spell list for your convenience.