Gutter Systems. A total gutter system gives homeowners peace of mind and helps maintain a home's investment value for years to come.
PSID or Psid may stand for: 1  Pounds per square inch differential. 2  the Panel Study of Income Dynamics, a long term survey of a set of households in the United States. 3  PSID64, a player for SID music.
The defined daily dose (DDD) is a statistical measure of drug consumption, defined by the World Health Organization (WHO). It is used to standardize the comparison of drug usage between different drugs or between different health care environments.