A Pocket Query (or PQ for short) is a premium member feature of Geocaching.com. PQs are files which are custom generated by the web site for a given member based on several criteria, including location, size, found status, date placed, and more. A single PQ can contain up to 1000 caches each, and members are allowed to generate up to 5 PQs per day. PQ files may be utilized by several geocaching applications and GPS devices. Some geocaching applications like GSAK are capable of merging and backing up multiple PQs over time, providing an off-line database of caches. Because PQs are tailored for a specific user, sharing these files will most likely violate Geocaching.com's terms of use.