2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/9857We discuss the nature of non-LTE effects affecting abundance analysis of cool stars. The departures from LTE of importance for the B I lines in solar-type stars are described and some new results are presented. Boron abundances derived under the LTE assumption have significant systematic errors, especially for metal-poor stars. For beryllium, current results suggest that departures from LTE will not affect abundance analysis significantly.10p, uuencoded compressed postscript, 4 figures (and text) available with anonymous ftp from hugin.astro.su.se directory: pub/solar/elba, for the proceedings of ESO/EIPC Workshop on the light element abundances, Elba 1994, NORDITA-94/45 AAstrophysicstext