Xcoo provides bioinformatics solutions and services based on the advanced computer and information technologies for medical doctors and oncologists. Our software solution "Chrovis" brings brilliant discoveries from massive volumes of genomic, biological, medical, and clinical data. Chrovis annotation service provides clinical interpretations of gene variations and is for molecular tumor board (expert panel) of cancer gene panel test or precision medicine oncology. We contribute to the sustainable development of genomic and medical research, personalized medicine, drug development, and molecular diagnostics.