USS may refer to:

Various organizations:

  • Union of Secondary Students, a student-rights advocacy group in Ireland
  • Union Switch & Signal, a supplier of railroad switching equipment
  • Union Syndicale Suisse, the Swiss Trade Union Confederation
  • United Seamen's Service
  • United States Senate
  • United States Steel Corporation
  • Universal Shopping Solution from HEAERIE, GSL.
  • USA Swimming, formerly United States Swimming, the National Governing Body for competitive swimming in the United States

In computing:

  • Unformatted System Services, the mechanism within VTAM to format a terminal's initial screen and route to selected applications. Sometimes also referred to as USSTAB or USS Table which is the assembler macro used to in the construction of such screens. The resulting screen image is called a USS message.
  • Informally, and arguably incorrectly, UNIX System Services, a component of z/OS. IBM maintains a list of official acronyms, and this usage does not appear on its list, but only Unformatted System Services
  • Upload Speed Sense, a method of regulating a host's upload bandwidth in the eMule client

USS may also refer to:

  • Ubiquitous Synergy Seeker, a Canadian band
  • Ultrasound Scan, a scientific and medical diagnostic technique
  • United Star Ship or United Space Ship, as a ship prefix in the Star Trek franchise
  • United States Ship, typically as a ship prefix in the United States Navy (includes submarines)
  • United States SIGINT system
  • United States Standard, an older standard of screw thread
  • Universal Spinal System, an implantable device (instrumentation) for correcting a spine exhibiting scoliosis
  • Universities Superannuation Scheme, a pension scheme in the United Kingdom
  • Uxbridge Secondary School, a high school in Uxbridge, Ontario, Canada
  • Union of Sovereign States, the planned successor to the Soviet Union
  • Universal Studios Singapore
  • Universal Serial Interface Protocol, a protocol develop by Siemens
  • University of Southern Somalia