Questions whose answers are a big list of items (books, theorems, software, ...)
Use if the question will not have an answer to be accepted but the answers will be a list of items, e.g.
- "what papers should everyone read?",
- "What are the major unsolved problems in theoretical computer science?",
- "What are the uses of error-correcting codes in theory?".
See the questions tagged with big-list for more examples.
It is also common (but not always necessary) to make a big-list question a Community Wiki.