From an industry news release:
Navis, a global technology company that manages the movement of cargo through terminals, has announced that DP World Australia has reached a major milestone, completing Navis N4 terminal operating system (TOS) upgrades on three of four planned DP World sites. DP World Sydney, DP World Fremantle and, now, DP World Melbourne have concluded TOS implementations and are fully operational.
The fourth and final N4 implementation is currently in progress at DP World Brisbane and is expected to be operational by Q1 2014. Once complete, Brisbane will be the first automated operation for DP World Australia.