For sizing purposes, IBM capacity planners generally group mail users into four different categories based on workload characteristics: light, medium, heavy, and power users.
出于分级目的，IBM容量计划人员通常基于工作量特征将邮件用户分为四个种类：轻、中、重和强用户。
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For example, there are blue gloves for size medium and indigo gloves for size large to differentiate sizing or blue gloves for poultry and green gloves for vegetables.