Dear colleagues, Due to COVID-19 the ISMB 2020 conference will take place 100% online using a virtual platform. Join us online for the Computational Mass Spectrometry (CompMS)COSI session on July 15, 2020. With COVID-19 disrupting the world as we know it, we know how important it is to continue the exchange of science in these trying times. Therefore, the ISMB conference, the world's largest bioinformatics/computational biology conference, is going virtual so that you can still enjoy all of our great scientific content. We hope that you will take advantage of this situation by sharing your work with colleagues all over the world. The CompMS COSIpromotes the efficient, high quality analysis of mass spectrometrydata through dissemination and training in existing approaches and discussion of new, innovative approaches. The CompMS initiative aims to exploit synergies between different application domains, in particular proteomicsand metabolomics. Date: July 15, 2020 (CompMS COSI) / July 13–16, 2020 (ISMB) Website: https://www.iscb.org/ismb2020 Key dates April 16, 2020: Abstract submission deadline May 14, 2020: Talk/poster acceptance notifications May 28, 2020: Late poster submission deadline June 4, 2020: Late poster acceptance notifications July 13–15, 2020: virtual ISMB conference Call for proposals Submit your abstract to ISMB to present your work to a global bioinformatics/computational biology audience. Attend the virtual CompMS session to learn about the latest algorithmic advances in mass spectrometry-based proteomics and metabolomics. Please remember to select the CompMS COSI as your session of interest upon submitting your abstract. Call for abstracts: https://www.iscb.org/ismb2020-submit/abstracts The CompMS organizing committee. Wout Bittremieux Oliver Kohlbacher William Stafford Noble Timo Sachsenberg Olga Vitek