sandbox: n. 1. (also `sandbox, the') Common term for the R&D
department at many software and computer companies (where hackers in
commercial environments are likely to be found). Half-derisive, but
reflects the truth that research is a form of creative play.
Compare playpen. 2. Syn. link farm. 3. A controlled environment
within which potentially dangerous programs are run. Used esp. in
reference to Java implementations.