以前的老问题啊,怎么不找一下呢
PLT (also HPGL) is the standard language for printing line drawings created by Hewlett-Packard. HPGL is supported by many CAD programs, charting programs and word processors.
下面网址有他的介绍,可看看,其他就不知道啦
http://www.wotsit.org/search.asp?s=printer