See the other stories in this series, tracking several companies deploying tablets and smartphones:

In sort, companies are bogging down in a flood of apps they can't use. And the ones they can use from the online app catalogs often lack the technical and customer support that both IT groups, and frontline employees, are used to.

Software vendors that traditionally supply enterprise line of business software for servers and PCs now face a learning curve in adapting these , especially their user interfaces, for touch screens. And if corporate IT groups try to build their own apps, they run into the same learning curve. Some companies are reporting unexpected jumps in mobile app development costs, as a result.