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#minilesson The difference between applications and infrastructure;

Infrastructure is the operating system that applications live on. Think windows, linux, containers, and so much more. Sometimes hardware is included in this category (depending on who you talk to).
Infrastructure is necessary to run an application. Operating systems are also all standardized, not unique in nature. If we’re both running SQL server 2012 R2, we both have the same options for patches, configuration, etc. Operating systems are software that speak to hardware.
Applications are software that speak to operating systems, databases, APIs and anything else you can think of. There are custom applications (what I’m almost always talking about, software developed for a specific business need or as a product to sell), COTS…
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