Power-law　creep　of　polycarbonate　was　investigated　by　Berkovich　indentation　under　three　different　conditions　at　room　temperature,　namely:　constant　displacement　rate　condition,　constant　displacement　loading　condition,　and　constant　ratio　of　loading　rate　over　load　condition.　Only　the　data　during　the　loading　process　were　analysed,　and　the　experiments　under　different　loading　conditions　gave　consistent　results　that　accorded　well　with　theoretical　prediction　by　dimensional　analysis　of　indentation　of　power-law　creep　material.　Material　constants　were　characterized　by　curve　fitting　of　the　experimental　results　with　theoretical　equations,　and　the　power　law　exponent　for　the　power-law　creep　relation　was　found　to　be　about　0.138　for　the　notably　soft　polycarbonate.　©　2017　IOP　Publishing　Ltd.