Update README.md

README.md

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 Filby is like source control for reference data.
 
-- In systems like git, you have a **commit log** comprising a sequence of **commits**. Each commit is uniquely identified by a **commit hash** and typically bundles related **source code** changes. <br/><br/>
+- With SCM systems like git, you have a **commit log** comprising a sequence of **commits**. Each commit is uniquely identified by a **commit hash** and typically bundles related **source code** changes. <br/><br/>
 - With Filby, you have a **change log** comprising a sequence of **change sets**. Each change set is uniquely identified by a **change set id** and typically bundles related **reference data** changes.
 
 Like checking out a commit, your applications can use Filby to retrieve reference data for a given change set id. They can also inspect the changelog to find which change set was in effect at a given point in time, and subscribe to reference data update notifications.