Visionary: Fujitsu

Fujitsu, the Japan-based IT outsourcing giant, operates a service desk that's manned by 677 agents in the U.S., Canada, Costa Rica and other countries, according to Gartner. Fujitsu also provides on-site desktop services through 431 technicians in the U.S. and Canada. It supports approximately 391,000 service desk users, 293,000 desktop users, over 295,000 desktops/notebooks, 17,000 virtual desktops, and 19,000 smartphones and tablets, Gartner said, adding that the firm's growth in North America topped 29 percent in 2015.