spool.er
n.（名词）A computer program that sequences print jobs by temporarily storing them in a buffer and sending each to the printer when the printer is able to process it.Also called print spooler 缓冲器：通过把打印任务暂时储存在缓冲器中，并在打印机可以处理时将每个打印任务发往打印机，从而对打印任务进行排序的计算机程序也作 print spooler
