The services you suggest in the SLA might be those an IT department provided to the business if the business were highly IT literate and independent of IT and had a poor perception of IT. If they treated IT as an ISP providing crude infrastructure and no more.
In general, I hope we work in IT departments that are more of an ASP: that provide managed applications to the business. In which case what you list are not services at all but technology layers that underpin the services.
Services should be as the business sees and consumes them: "what comes out of the pipe". e.g.
- communications (broken down into voice, email, voip ...)
- inventory system
- desktop productivity tools
- desktop hardware management
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