A research/educational tool for experimenting with array data dependence tests and reordering transformations. It works with a language tiny, which does not have procedures, goto' s, pointers, or other features that complicate dependence testing. Michael Wolfe' s original tiny has been extended substantially by William Pugh et al. at the University of Maryland. Version 3.0 (Dec 12th, 1992) includes a programming envIRonment, dependence tester, tests translator (Fortran->tiny), documentation, and technical reports. It should run on any Unix system. . E-mail: Omega test research group . (1992-12-12)