1598, "quickly," used by conjurers, etc., from It. presto "quick, quickly" in conjuror's patter, from L. præstus "ready," præsto (adv.) "ready, available," from præ "before" + stare "to stand," from PIE base *sta- "to stand" (see stet). Cf. L. præsto
A parallel language for shared-memory multiprocessors, built on top of C++ by Bershad et al, U Washington 1987. PRESTO provides classes for threads and spinlocks as well as Mesa-style monitors and condition variables. (ftp://cs.washington.edu/pub/presto1.0.tar.Z). E-mail: presto@cs.washington.edu. ["PRESTO: A Kernel for Parallel Programming Environments", B.N. Bershad et al, U Wash CS TR, Jan 1987].