In the world of banking, the teller has always occupied a clear and narrowly defined place. Traditionally, a good one handled customer transactions at the window quickly and accurately. The word "teller," after all, comes from the Dutch verb, "tellen," to count.

But the teller position is undergoing a transformation. As banks embark on a crusade to turn branch employees into more effective sales people, some have discovered the value of enlisting tellers, who are often the only bank employees with whom customers have contact on a regular basis.

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