A call centre (Commonwealth spelling) or call center (American spelling; see spelling differences) is a centralised office used for receiving or transmitting a large volume of enquiries by telephone. An inbound call centre is operated by a company to administer incoming product or service support or information enquiries from consumers. Outbound call centres are operated for telemarketing, for solicitation of charitable or political donations, debt collection, market research, emergency notifications, and urgent/critical needs blood banks. A contact centre, further extension to call centres administers centralised handling of individual communications, including letters, faxes, live support software, social media, instant message, and e-mail.