The American Society for Microbiology (ASM) has placed online the journal Microbiology and Molecular Biology Reviews. Full-text content begins with March 1998; abstracts and tables of contents are available online back to 1992. MMBR is a "definitive, broad-based review journal in the expanding disciplines of microbiology, immunology, and molecular and cellular biology." All online content is searchable. Access to the full-text articles is free through December 1998.