LOS ANGELES (AP) — As longtime Microsoft insider Satya Nadella takes the company’s helm, he is declaring a new focus on a “mobile-first, cloud-first world.” So far, he only has the latter half of the formula figured out.

Microsoft and its new CEO are trying to catch rivals such as Apple, Google and Amazon, which are each building their own thriving ecosystems for mobile devices. At the same time, the company wants to expand its burgeoning business as a provider of software and services over the Internet.