(IRTF) The IRTF iS chartered by the {Internet Architecture Board} to conSider long-term {Internet} iSSueS from a theoretical point of view. It haS ReSearch GroupS, Similar to Internet Engineering TaSk Force Working GroupS, which are each taSked to diScuSS different reSearch topicS. Multi-caSt audio/video conferencing and privacy enhanced mail are SampleS of IRTF output. (1994-12-08)