For knowledge workers, this often means using an online SaaS application, which mayor may not be officially sanctioned by the central IT group. Many use the term shadow IT, or now more frequently referred to as business-ledIT, to describe the purchase of technology that is not officially sanctioned by IT.

As the number of SaaS applications have increased, workers have naturally adopted a slew of online tools, and most of the shadow IT today are SaaS applications. Despite the industry's best efforts, shadow IT has not gotten smaller but has increased and is close to becoming legitimized as a viable IT strategy that provides competitive benefits.

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