Expertise sharing systems This correspondence is a follow-up to [1]. His assumption is that researchers use web-based search queries to find papers of interest. This is so pervasive that people have a hard time conceiving of anything else. Almost 20 years ago, I pioneered an alternative. In 1998, I created the “NEP: New Economics Papers” service to announce new working papers in the RePEc digital library through weekly subject-specific reports. The reports are maintained by volunteer editors. To help them cope with an ever-increasing inflow, I built ernad in 2004. It was the first ever textual information retrieval system that uses no queries whatsoever. Instead it uses data from previous selected and non-selected papers in the reports. In 2017 I launched “bims: BioMed News”. This is an ernad implementation based on PubMed. PubMed churns out about 30000 new papers a week. Users gain two benefits. First the machine-learning results are more broader, more precise and more fun than repeated PubMed searches. Second, the results are made publicly available as open data. Thus users get name recognition. I like to think about NEP and Bims as expertise sharing systems. Participation is free. In 2022, with a 5000 euro grant from NLNet, I developed an email-based subscription system to be used by NEP and Bims. Subscriptions are smart. If readers subscribe to multiple reports, duplicated items are filtered out. Thus report readers are spared repeats of the same items, as is common on social media. Reference: Leeming, J., Nature 6 April 2023, https://www.nature.com/articles/d41586-023-01011-2 Author: Thomas Krichel Open Library Society, Inc. 34-20 78 Street Apt. 3D Jackson Heights, NY 11372-2572 USA http://openlib.org/home/krichel Email: krichel@openlib.org https://orcid.org/0000-0002-8421-6356