Moderate Impact System definition in Computer Security terms:
Definition(s): An information system in which at least one security objective (i.e., confidentiality, integrity, or availability) is assigned a FIPS 199 potential impact value of moderate and no security objective is assigned a FIPS 199 potential impact value of high.
Source(s): NIST SP 800-18 Rev. 1
reference: CSRC Glossary