The Cumulative Index to Nursing & Allied Health Literature is now available online through both BRS and DIALOG. Known as the NURSING & ALLIED HEALTH (CINAHL) file, it is the data base of choice for professionals in these fields. Unlike the National Library of Medicine's Medical Subject Headings (MeSH), CINAHL has a strong nursing orientation and a specific, current nursing vocabulary. Search techniques are similar to those used on MEDLINE since CINAHL has adopted the powerful MeSH tree structure format. The arrival of this data base is a significant advance for the nursing profession.