This document discusses databases in bioinformatics. It begins by explaining that bioinformatics concerns the creation and maintenance of biological databases to allow researchers to access existing information and submit new entries. The aims of bioinformatics are to organize data, develop analysis tools, and use these tools to analyze data and interpret results in a biologically meaningful way. Several important biological databases are described, including nucleotide sequence databases like NCBI and protein sequence databases. GenBank is also discussed as the annotated collection of all publicly available DNA sequences. Biological databases make large datasets available to researchers and are important for biological research infrastructure.