What features of West's Key Number System are accessible online but not in print?

The correct answer encompasses the understanding that the online version of West's Key Number System offers enhanced features that are not available in the print version.

One significant aspect of the online system is the advanced search options which allow users to perform more precise searches and utilize various search strategies, such as Boolean searches or filtering results based on specific criteria. This functionality is limited or non-existent in the print format, which relies on a more straightforward, linear access to information.

Additionally, the aggregation of cases by issue is a transformative feature in the online version where users can easily find and analyze a collection of cases categorized under specific key numbers. This enables a more efficient research process, allowing legal professionals to compile pertinent cases without having to sift through print volumes.

Case summaries, which provide quick insights into the court's decisions and rationales, are also more readily accessible in the online format. These summaries enhance the research experience by summarizing vast amounts of information concisely, a convenience that is less effectively provided in traditional print.

Taken together, these features illustrate the advantages of utilizing the online Key Number System over the print counterpart, making the understanding of this choice crucial for effective legal research.