2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163081Brief summaries are given about (1) close binary research from the perspective of the Bibliography of Close Binaries, (2) low-mass binaries and model discrepancies, (3) W UMa-type binaries, (4) cataclysmic variables, (5) Algol binaries, (6) the oEA stars, (7) effects of binarity on stellar activity.To appear in the IAU Transactions Vol. XXVIIA (2006 - 2009), ed. Karel van der HuchtAstrophysicstext