Bioinformatics Systems Tantigen an online a data source and analysis platform for cancer vaccine target discovery focusing on human tumor antigens that contain HLA ligands and T cell epitopes. HPVdB an online data source and analysis platform for Human Papillomavirus immune target discovery by focusing on HPV antigens that contain HLA ligands and T cell epitopes. EBVdB an online data source and analysis platform for Epstein-Barr virus immune target discovery by focusing on EBV antigens that contain HLA ligands and T cell epitopes. Dana-Farber Repository for Machine Learning in Immunology a data repository that bridges the gap between immunological and computer science/machine learning communities by providing preprocessed and scaled immunological data sets suitable for use in machine learning applications. PREDmus an online system for the prediction of peptides binding to MHC alleles of several commonly used laboratory mice. MULTIPRED2 a system for large-scale screening of allele-, genotype-, and supertype-specific HLA associated peptides. PREDBALB/c a computational system that predicts peptides binding to the major histocompatibility complex-2 (H2d) of the BALB/c mouse, an important laboratory model organism.