Agricultural Labor Action or PALA [Carlos Alberto SOLIS Blanco]; Costa Rican Renovation Party or PRC [Justo OROZCO]; Democratic Force Party or PFD [Jose M. NUNEZ]; Libertarian Movement Party or PML [Otto GUEVARA Guth]; National Christian Alliance Party or ANC [Alejandro MADRIGAL]; National Independent Party or PNI [Jorge GONZALEZ Marten]; National Integration Party or PIN [Walter MUNOZ Cespedes]; National Liberation Party or PLN [Sonia PICADO]; Social Christian Unity Party or PUSC [Luis Manuel CHACON] Note: mainly a two-party system - PUSC and PLN; numerous small parties share less than 26% of population's support Political pressure groups and leaders: Authentic Confederation of Democratic Workers or CATD (Communist Party affiliate); Chamber of Coffee Growers; Confederated Union of Workers or CUT (Communist Party affiliate); Costa Rican Confederation of Democratic Workers or CCTD (Liberation Party affiliate); Federation of Public Service Workers or FTSP; National Association for Economic Development or ANFE; National Association of Educators or ANDE; Rerum Novarum or CTRN (PLN affiliate) [Gilbert Brown]