/nyu p*rl/ Nearly Ultimate PRL. A systEM for interactive creation of formal mathEMatics, including definitions and proofs. It has an extrEMely rich type systEM, including dependent functions, products, sets, quotients and universes. Types are first-class citizens. It is built on Franz Lisp and Edinburgh ML. ["ImplEMenting MathEMatics in the Nuprl Proof Development SystEM", R.L. Constable et al, P-H 1986]. (1994-12-13)