The refinements & distortions of Charles A. Ferguson's initial formulation of diglossia ("Diglossia," Word, 1959, 15, 325-340) are examined. The various typologies of diglossia according to situation ...(pseudodiglossia & partial & total diglossia), variation scale (optimal, suboptimal, & superoptimal), origin (endoglossic vs exoglossic), & geographic extent (total, locally differentiated, & localized) are reviewed & applied to characterize Slavic diglossia. The history of Slavic diglossia is outlined & its differential impact across various literary languages is reassessed. Some prognostic speculations on the possible outcomes of the present diglossic situations in Slavic languages are made. Modified HA
