It is with great sadness that we announce the passing of Tom?? Kalibera on 1 April, a valuable member of the R core team for close to 10 years and a good friend, after a short but aggressive illness. Tom?? brought in fresh perspective and knowledge, enabling him to improve many aspects of R, including performance and reliability. He created many tools aimed at aiding package authors to make their packages more reliable, and was instrumental in modernizing the Windows build of R. He was an active member of CRAN and the R community, providing help to package authors, and he was the most prolific writer on the R core blog. He will be remembered for his profound contributions to R by millions of users. He is survived by his wife and 1 year old son. A full obituary will be posted in due time. Respectfully, Simon Urbanek _______________________________________________ R-announce at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-announce