The program allows you to perform a literature search on (currently) the following journals:
The Journal of the Oughtred Society (All volumes to Vol 27 No. 2 2018)
The Slide Rule Gazette (All volumes to Issue 18 Autumn 2018)
Skid Stick (All volumes to No. 61 January 2019)
Proceedings of the International Meeting of Slide Rule Collectors (With thanks to the UKSRC - All volumes to the 24th Meeting September 2018) 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.