Maxwell Communications Corp Plc and Philips NV have signed a letter of intent to study the feasibility of establishing a joint venture multimedia publishing company called Maxwell Multi Media to produce self-teach language courses using interactive compact discs: Berlitz Publications Inc, a subsidiary of Maxwell Communications, and Philips Langauge Learning Systems Group, will produce the course material, and the series will be available from the end of 1991 to coincide with the worldwide launch of Interactive Compact Disks for the consumer market; the 5 optical disks have been developed by Philips, Sony and Matsushita and will be introduced in Japan and US in 1991.