Google Apps adoption is growing in Asia, in part because Asian companies often have smaller investments in legacy platforms, says Google (GOOG -1%) enterprise chief Amit Singh. Steelmaker Posco and airline ANA Holdings are among the Asian companies embracing Apps. Google has also bagged some big U.S. clients, but growth has been slowed by security concerns and big investments in Microsoft Office (MSFT +0.3%), as well as user familiarity with the latter. Gartner estimates Microsoft still has 93% of the productivity software market, and 80% of the corporate e-mail space. Redmond is counting on Office 365 (more expensive than Apps, but comes with on-premise app support) to keep businesses loyal.