Chemstation (copyright Agilent Technologies Inc.) is a trade name for their Instrument Control / Data Analysis software package.  It has been around for many years and has earned its place as an industry standard.  There are currently two versions:   Chemstation for GC/MS only   and the  "Multi-technique" Chemstation for GC, LC, LC/MS and a couple other instruments.  Each of these two "Chemstation" have their own Product Number and Revision Number, see FAQ to learn how to determine.