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Reference.org
Clock synchronization
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<p>Clock synchronization is a topic in <a href="/facts/Computer_science/lN3pEyPz">computer science</a> and <a href="/facts/Engineering/RFVg8H3I">engineering</a> that aims to coordinate otherwise independent <a href="/facts/Clock/MYolzNkw">clocks</a>. Even when initially set accurately, real clocks will differ after some amount of time due to <a href="/facts/Clock_drift/IJMwbUCh">clock drift</a>, caused by clocks counting time at slightly different rates. There are several problems that occur as a result of clock rate differences and several solutions, some being more acceptable than others in certain contexts. </p>