A memory device includes address bus termination circuitry that can be enabled or disabled depending on the state of an address bus termination control signal. A needle connector and a needle hub with needle form an assembly with a cavity for the passage of liquid. The encrypting unit encrypts the group key so as to be capable of being decrypted by a first child node other than the first node out of the child nodes of the root node. The locking member is preferably a lever movable relative to the body portion and having a projection engageable with a ramped surface on one of the body portion or the base to lock the paper guide relative to the base.