sandbender = S = sanity check

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.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.