This Recommendation identifies the Functional Services that comprises TASC (Telecommunications Applications for Switches and Computers) and is one in the Q.1300-Series on TASC. This Recommendation identifies the TASC Functional Services which provide building blocks for application developers. The main purpose of TASC is to allow applications to be developed which integrate the services provided by both computing and telecommunication platforms. This would typically allow business applications to use TASC to integrate the computer workstation and telephone at the user's desktop. This Recommendation does not define how the Functional Services should be implemented. These Functional Services can be used to support applications that integrate the use of telecommunication and computing platforms.