The International Society for Computational Biology (ISCB) addresses scientific policies, provides access to high quality publications, organizes meetings, and serves as a portal to information about training, education, employment and news from related fields. It hosts annual meetings, including ISMB, the world's longest running and largest bioinformatics conference (held jointly with ECCB every other year in Europe). It has two official journals of the highest impact factors in the Mathematical & Computational Biology category.
The Bioinformatics Organization ...one of the largest affiliations in the field of bioinformatics. It serves the scientific and educational needs of bioinformatic practitioners and the general public. Maintains computational resources to facilitate world-wide communications and collaborations between people of all educational and professional levels. Provides and promotes open access to the materials and methods required for, and derived from, research, development and education.
American Medical Informatics Association (AMIA) ...a group of individual and organizations promoting the effective organization, analysis, management, and use of information in health care in support of patient care, public health, teaching, research, administration, and related policy. AMIA’s 4,000 members advance the use of health information and communications technology in clinical care and clinical research, personal health management, public health/population, and translational science with the ultimate objective of improving health.
DBMI designs, implements, and evaluates informatics algorithms and systems that serve biomedical researchers, other healthcare providers, and public health professionals.
Bioinformatics: Research, development, or application of computational tools ... expanding the use of biological, medical, behavioral or health data....
Computational Biology: ...development and application of data-analytical and theoretical methods, mathematical modeling and computational simulation techniques to the study of biological, behavioral, and social systems.
from Biomedical Information Science and Technology Initiative. NIH Working Definition of Bioinformatics and Computational Biology