A curated selection of excerpts from a larger work, often a textbook, focusing on essential concepts or frequently referenced sections can be compiled. This compilation, sometimes physical and sometimes digital, allows for streamlined access to key information, serving as a quick reference or a study guide. For instance, a complex engineering textbook might have its core formulas and tables assembled into a smaller, more manageable format.
Such focused collections provide several advantages. They distill complex information into accessible portions, facilitating quicker comprehension and review. This is particularly beneficial for students preparing for examinations or professionals needing rapid access to crucial data. Historically, creating these focused resources was a common practice, especially before widespread digital search capabilities. The practice reflects an enduring need to efficiently organize and access vital information.