Marcel Alvarez-O'Donnal, general director of Trento Industrial Parks of Sonora, speaks at a dinner from 5:30 to 8:30 p.m., Wednesday, May 19. RSVP is required by Tuesday, May 18. $30; $25 for SALEO members and first-time attendees. Call 792-1093, ext. 483, to RSVP or for more information.