In common parlance, post office is used to refer to a wide variety of facilities operated by the United States Postal Service (USPS). In administrative practice, the USPS differentiates among several categories of postal facilities. Regarding one category of its facilities, the USPS announced in May 2009 that it was considering the closure of 3,105 of its 4,851 post office branches and stations. These facilities provide the public with postal services, such as stamp sales, post office boxes, and package shipping.