| v | Instantaneous voltage |
| V | Vacuum tube |
| V, v | Volt |
| VA | Volt ampere |
| VAC | Volts alternating current |
| VAD | Vertical Axial Deposition |
| VAR | Value added reseller |
| VAT | Value Added Tax |
| VB | Valence Band; Vertical Bridgman |
| VBAP | Voice Band Audio Processor |
| VBE | DC voltage base to emitter |
| VBM | Valence Band Maximum |
| VBR | Breakdown Voltage |
| VCA | Voltage Controlled Amplifier (or Attenuator) |
| VCE | DC voltage collector to emitter |
| VCML | Vodafone Content Markup Language |
| VCO | Voltage Controlled Oscillator |
| VCR | Video Cassette Recorder |
| VCSEL | Vertical Cavity Surface Emitting Laser |
| VCXO | Voltage Controlled Crystal Oscillator |
| VD | Drain Voltage |
| VDC | Vehicle Dynamic Control |
| VDC | Volts direct-current |
| VDR | Voltage Dependent Resistor |
| VDS | Vapor distribution system |
| VDSL | Very high bit-rate Digital Subscriber Line |
| VESA | Video Electronics Standard Association |
| VFD | Vacuum Fluorescent Display |
| VFEI | Virtual factory equipment interface |
| VFM | Variable Frequency Microwave |
| VGA | Variable Gain Amplifier |
| VGF | Vertical Gradient Freeze |
| VGS | Video Guidance Sensor |
| VHDL | Verilog Hardware Description Language |
| VHDL | VHSIC Hardware Description Language |
| VHF | Very High Frequency |
| VHORG | Vertically and horizontally organized grid |
| VHP | Very high productivity |
| VHRR | Very High Resolution Radiometer |
| VHS | Video Home System |
| VHSIC | Very high-speed integrated circuit |
| VIGS | Virtual Induced Gap States |
| VISC | Video Instruction Set Computing |
| VLA | Very large array |
| VLF | Very low frequency |
| VLIW | Very Long Instruction Word |
| VLL | Video Lead Locator |
| VLSI | Very Large Scale Integrated (circuit) |
| VLSI | Very Large Scale Integration |
| VM | Virtual machine |
| VME | Versa micromodule extension; Virtual manufacturing enterprise |
| VML | Vector Markup Language |
| VMW | Vertically modulated well |
| VNA | Vector Network Analyzer |
| VOC | Volatile organic compound |
| VoIP | Voice over Internet Protocol |
| VOM | Volt ohm milliameter |
| VPD | Vapor phase desorption; Vapor phase decomposition |
| VPIN | Vertical PIN diode |
| VPN | Virtual Private Network |
| VPO | Pinch-Off Voltage |
| VRAM | Video RAM |
| VRG | Vibratory Rate Gyro |
| VRP | Virtual Rapid Prototyping |
| VS | Source voltage |
| VSAG | VHDL Standardization and Analysis Group (IEEE) |
| VSAT | Very Small Aperture Terminal |
| VSI | Virtual Socket Interface |
| VSOIC | Very Small Outline surface mounted IC |
| VSPD | Variable Sensitivity PhotoDetector |
| VSS | Variable Soft Sphere |
| VSWR | Voltage Standing Wave Ratio |
| VT | Total voltage |
| VTP | Vertical Thermal Processor |
| VTR | Video Tape Recorder |
| VTVM | Vacuum-Tube VoltMeter |
| VVA | Variable Voltage Attenuator |
| VVTLEC | Variable Valve Timing and Lift Electronic Control |
| Vav | Voltage (average value) |
| Vc | Capacitive voltage |
| Vcc | Main Power Supply (in a circuit) |
| Vdd | Secondary power supply (in a circuit) |
| Vee | Negative power supply (in a circuit) |
| Vin | Input voltage |
| VL | Inductive voltage |
| Vm, Vmax | Maximum voltage |
| V-MOS | V-groove metal-oxide semiconductor |
| VoD | Video on Demand |
| Vout | Output voltage |
| Vp | Primary voltage |
| V-pol | Vertical polarization |
| Vpp | Programmable power supply (in a circuit) |
| VS | Source voltage |
| VT | Total voltage |
