任何人都可以申请一个帐户并管理他或她的PURL设置。
Anyone can apply for an account and administer his or her own set of PURLs.
许多软件都有网络版或支持多用户申请模式，这种系统可以保证任何人只要有空余的软件许可，在任何一个工作站点上都可以运行软件。
Many software applications have a network or concurrent licensing model. This means that anyone can work on any workstation as long as there is an available license in the pool.
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