6-letter words containing i, m, p, a
- simpac — Early simulation language with fixed time steps. "Simpac User's Manual", R.P. Bennett et al, TM-602/000/000, Sys Devel Corp, Apr 1962.
- simpai — a long-tailed monkey native to Sumatra
- simpas — Event scheduling language, implemented as Pascal preprocessor. "SIMPAS - A Simulation Language Based on Pascal", R.M. Bryant in Proc 1980 Winter Sim Conf, T.I Oren et al eds, pp.559-572.