Psid

PSID or Psid may refer to:

Science and technology

 * Pounds per square inch differential, a unit of measurement
 * PSID, a standard for MOS Technology SID music files
 * Provider Service Identifier, in the family of Wireless Access in Vehicular Environments standards
 * Physical Security ID, an ID present on some SSDs

Other uses

 * Panel Study of Income Dynamics, a long term survey of a set of households in the US