The program allows you to perform a literature search on (currently) the following journals:
The Journal of the Oughtred Society (All volumes to Vol 26 No. 1 2017)
The Slide Rule Gazette (All volumes to Issue 17 Autumn 2017)
Skid Stick (All volumes to No. 56 June 2017)
Proceedings of the International Meeting of Slide Rule Collectors (With thanks to the UKSRC - All volumes to the 22nd Meeting September 2016) There was no Volume 10 published - Volume 10 has been published in the form of the ARISTO book by Klaus Kuhn and Karl Kleine.
From Vols 12, 15, and 19th only the English articles are available.