Abstract: A method can include providing, by a computing system to a group of user devices, information to display a first graphical user interface (GUI) including a list of customer orders for fulfillment, receiving, from a first user device, selection of a control to prepare an order in the list, providing, to a subset of the group, instructions to update the first GUI to include an indication that the order is being prepared, providing, at the first user device, information to display a second GUI including indications of order hold locations and bags associated with the locations for the selected order, and receiving, from the first user device, identifying information for the bags, providing, to the first user device, instructions to update the second GUI such that the bag indications are updated from a first indicia to a second indicia.