London-based Service 800 has introduced an international telephone credit card for business travellers to the US which will cost $50 per year in Europe, the Middle East, the Far East and North America: by dialling a local toll-free number, followed by the required long distance number and a personalised authorisation code, the cardholder can make calls from any private or public telephone in the US, and enables users to phone from their US hotel room at the local rate, the calls are then billed to the cardholder’s address or credit card account; at present the card can be used only for outbound calls from the US, but next year it will take inbound calls from countries such as the UK, Japan, and France, and Service 800 hopes that it will be in world-wide use by late 1989.