In a prediction of abrasion characteristic of a tire, a characteristic curve of a tire axis force generated on a tire rotation axis at the slip ratio applied to the tire and changed depending upon the slip ratio is acquired. Data is obtained from a tool in the borehole for a plurality of positions in the borehole that is being drilled to form acquired data. The second handheld device has a receiving unit that receives the result of the determination from the first handheld device. The server accesses a plurality of entity profiles that are based on content andor structure in other conversations in which the user is a participant. Where more than two columns worth of IOBs is required, more than two columns of IOB tiles can be provided.