I think you are both right. The term "killer app" can be used for something that causes people to buy something else no matter how expensive just to have that f

I think you are both right. The term "killer app" can be used for something that causes people to buy something else no matter how expensive just to have that first thing. Visicalc for the Apple II, Lotus 123 for the IBM PC and clones (previous apps ran equally well on non clone MSDOS machines), and the web browsers as you mentioned. Normally it is associated with making something very popular, and in that regard the Analyst certainly wasn't. But it did get a small group to buy absurdly expensive D-machines from Xerox just to run it, though I think it was more than those who bought them to run Lisp: http://www.bitsavers.org/pdf/xerox/dolphin/1100_Scientific_Information_Processor_Fact_Sheet.pdf http://www.bitsavers.org/pdf/xerox/dolphin/1100_Scientific_I... More about the Analyst from later in its life: http://www.bitsavers.org/pdf/xerox/xsis/ http://www.bitsavers.org/pdf/xerox/xsis/