预付费电能表规范，规范中定义了应用的密钥体系设计以及各种卡片功能的说明。-Prepayment meter specification, the specification defines the application of the key system design and various functions of the note cards.

超市管理系统： 一、基本功能：智能订货、进货入库、进货退回、销售出库、销售退货、报损、报溢、调入、调出、拆零、组装、盘点、借出、借入、收款、付款、预收、预付、收入、支出、成本、利润及财务会计核算等。 二、增强功能：售后服务、电子称重、捆绑销售、赠品管理、促销管理、定价管理-First, the basic functions: intelligent order, purchase storage, purchase returned a library sales, sales r

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