Normally sent using ordinary, international postal systems, QSL cards can be sent either "direct" to an individual's address, or via a country's centralized amateur radio association "QSL bureau", which collects and distributes cards for that country. This saves postage fees for the sender by sending several cards destined for a single country in one envelope, or large numbers of cards using parcel services. Although this reduces postage costs, it increases the delivery time because of the extra handling time involved. In addition to such "incoming" bureaus, there are also "outgoing" bureaus in some countries. These bureaus offer further postage savings by accepting cards destined for many different countries and repackaging them together into bundles that are sent to specific incoming bureaus. Most QSL bureaus operated by national amateur radio societies are both incoming and outgoing, with the notable exception of the United States of America, and are coordinated by the International Amateur Radio Union (IARU).