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A modified randomized block design was used to counterbalance the four assisted modes of STS, with the arm-assist modes being either the first or last mode to facilitate switching between assistance modes.
NCR will also unveil the NCR SelfServ Checkout Express Convertible, which can operate in both self-checkout and assisted modes, depending on store traffic.
SiRFLoc is SiRF's patented multimode architecture that supports both autonomous as well as aided GPS in mobile based and mobile assisted modes.

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