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RRDtool is designed to store time series of data. With every data
-update, an assosiated time stamp is stored. Time is always expressed
+update, an associated time stamp is stored. Time is always expressed
in seconds passed since epoch (01-01-1970). RRDtool can be installed
on Unix as well as Windows. It comes with a command set to carry out
various operations on RRD databases. This command set can be accessed