Research Lists help you more effectively research potential prospects. Research Lists are static groups of constituents. You can manually add or delete members from the list, or you can update lists using a selection created in Query. Researchers use these lists to locate prospects and determine the quantity, quality, and type of prospects available in their database.
Ad-hoc queries serve two main purposes. They are a quick way to see data filtered to your needs and they enable you to produce selections for use in other processes throughout the program. If you are quickly checking data, you may get all the information you need from the output fields you select in an ad-hoc query. Or you may want to drill into an actual record to view more detailed data. In this case, when you only want to explore your data — rather than feeding this list of records into some other process — the program presents the first 500 of the actual query results (rather than all of them) because it is not intended as a means of visiting each record individually in a large result set.