Virtual machines
In traditional data centers, you would have to buy or lease physical machines and have spare capacity to deal with additional web or user traffic. In the new world, virtual machines were one of the first public cloud offerings. You can think of it as similar to physical boxes, where you can install an operating system, remotely connect via SSH or RDP, and install applications and services. I would say that virtual machines have been one of the key building blocks for start-up companies to be successful. It gave them the ability to go to market with only small capital investments and to scale out with an increase in their web traffic and user volumes. This was something that previously only large organizations could afford, ...
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