Microsoft finally releases its secret weapon in the cloud wars with Amazon and Google Microsoft has long maintained that it has a secret weapon in the cloud wars against the Amazon Web Services juggernaut . The weapon is Microsoft's existing inroads into the business software market . And the strategy was never more apparent than in May 2015, when the company announced Azure Stack , a set of products that let you build your own version of the Microsoft Azure cloud in your own data center. Finally, after some delays , the secret weapon is out, with Microsoft announcing on Monday that Azure Stack-powered systems from Dell EMC, Lenovo, and HP Enterprise are now available to order for September delivery . Cisco and Huawei are expected to introduce their own shortly, says Microsoft. Normally, Azure is an Internet-based service where you get access to fundamentally unlimited pay-as-you-go supercomputing power, based in Microsoft's globe-spanning data centers. But buy one or more of these Azure Stack systems and plug it into your data center, and it'll lash together your existing servers into something that ostensibly works just like the "real" Azure. Billing is based either on how much you use Azure Stack, or how much computing capacity you use, depending on the model chosen and your plan. That's important for companies that may not be willing or able to move their own infrastructure into so-called public cloud platforms like Microsoft Azure, Amazon Web Services, or Google Cloud. Hybrid model In the industry, the key concept behind Azure Stack is known as "hybrid cloud," long a talking point for Microsoft . Cloud computing, of the kind exemplified by Amazon Web Services and Microsoft Azure Training, has all kinds of benefits over a more traditional data center approach. In old-fashioned data centers, you're generally not using each piece of hardware to its full capacity, leading to a lot of wasted resources.