Not unlike Adobe's Creative Suite. Quark was the go-to page layout program for years until Adobe ditched Pagemaker for InDesign, got it on OZX first, and made interaction between the Adobe programs, especially InDesign, Illustrator, Photoshop and Acrobat, pretty seamless. By the time Quark got the rag out of their a$$ with their OSX version everybody pretty much was using InDesign. I haven't seen a Quark file in 4 years.
You are lucky. I still stumble upon some of those on my full time job. Hate working in Quark
