Refers to hardware or software that is designed for fault tolerant operation. It mostly refers to software that has built-in safeguards against system failures. For example, an industrial-strength operating system runs its applications in protected address spaces and does not lock up the computer if an application fails. Industrial-strength features in a DBMS are referential integrity and two-phase commit. Programs become industrial strength after being thoroughly tested in live user environments for extensive periods. See bulletproof.