Works on second language acquisition theories, affective variables and communicative competence, and interlanguage were compiled as a result of a symposium on universals of second language acquisition at the University of Wisconsin, Milwaukee. The papers include: "On the Variability of Interlangauge Systems" (Elaine Tarone); "Memory, Learning, and Acquisition" (Earl W. Stevick); "Processing Universals in Second Language Acquisition" (Herbert W. Seliger); "Error Detection as a Function of Integrativity" (Jeff Kaplan and Michael Shand); "Comunicative Tactics in Children's Second Language Acquisition" (Muriel Saville-Troike, Erica McLure and Mary Fritz); "A Universal in L2 Acquisition Based on a PBD Typology" (Suzanne Flynn); "Processing Strategies and Morpheme Acquisition" (Bill VanPatten); "Accounting for Adult Acquisition of Relative Clauses: Universal Grammar, L1, and Structuring the Intake" (Christian Adjemian and Juana Liceras); "Dative Questions and Markedness" (Irene Mazurkewich); and "Temporal Systems and Universality in Interlanguage: A Case Study" (Lorraine Kumpf). (MSE)