This is an announcement for the paper "Descriptive set theoretic methods applied to strictly singular and strictly cosingular operators" by G. Androulakis and K. Beanland. Abstract: The class of strictly singular operators originating from the dual of a separable Banach space is written as an increasing union of $\omega_1$ subclasses which are defined using the Schreier sets. A question of J. Diestel, of whether a similar result can be stated for strictly cosingular operators, is studied. Archive classification: math.FA Mathematics Subject Classification: 47B07, 47A15 The source file(s), AlmostSC.tex: 41247 bytes, is(are) stored in gzipped form as 0806.0056.gz with size 12kb. The corresponding postcript file has gzipped size 95kb. Submitted from: giorgis@math.sc.edu The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/0806.0056 or http://arXiv.org/abs/0806.0056 or by email in unzipped form by transmitting an empty message with subject line uget 0806.0056 or in gzipped form by using subject line get 0806.0056 to: math@arXiv.org.