(UK: "sandpit") 1. A protected, limited environmeNT where applications (e.g. Java programs downloaded from the INTernet) are allowed to "play" without risking damage to the rest of the system. 2. A term for the R&D departmeNT at many software and computer companies (where hackers in commercial environmeNTs are likely to be found). The term is half-derisive, but reflects the truth that research is a form of creative play. Compare playpen. 3. link farm. [Jargon File] (2001-02-08)