BarCharts, based in Boca Raton, Florida, makes the QuickStudy line of laminated reference charts. The QuickStudy charts provide a single-page, flowchart-like overview of topics in a wide range of subjects, including academic, computer, medical/health, business, home and general interest. More than 100 titles have been translated into Spanish. BarCharts also makes booklets, flashcards and ATLAS of the Human Body.
Quick study is also a term for somebody who is a fast learner, i.e. "He is a quick study when it comes to anything having to do with cars".
References
QuickStudy Wikipedia(Text) CC BY-SA