Vss

Vss is an acronym or symbol used in several fields to denote different concepts. The meaning is highly context-dependent, and several distinct uses are common in electronics, computing, software development, and automotive engineering.

In electronics, Vss denotes the negative supply voltage or ground reference for circuits, typically 0 volts and opposite to Vdd or Vcc. It serves as the return path for current and a reference potential for amplifiers and digital logic. In integrated circuits, Vss is often connected to the device substrate or package ground.

In computing, Volume Shadow Copy Service (VSS) is a Windows service that enables the creation of snapshot backups of computer volumes, even while they are in use. It coordinates with backup applications to ensure data consistency by staging writers and storing shadow copies, from which backups can be restored.

Visual SourceSafe (VSS) was a version control system from Microsoft integrated with Visual Studio. It managed source code and binary assets in a centralized database. It has been discontinued and is commonly replaced by more modern systems such as Team Foundation Server/Azure DevOps or Git-based workflows.

In automotive engineering, Vehicle Speed Sensor (VSS) refers to a sensor that reports wheel or transmission speed to the engine control unit and other systems, used for functions such as speedometer operation, cruise control, and transmission shift logic.