The ACTS program moves the results of the R&D of the parent RACE progr
am nearer to realization through technology and user trials. Particula
rly in the mobile domain of ACTS, several projects have been investiga
ting the user dimension in the context of the third-generation Univers
al Mobile Telecommunications Service. Results so far suggest many oppo
rtunities to broaden participation, exploit the inherent benefits of t
he mobile environment, and take advantage of the enormous improvements
in wireless communications to realize the potential of global multime
dia mobility.