500+ Key Electrical & Electronics Engineering Abbreviations

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Electrical & Electronics Engineering Abbreviations

  1. AC – Alternating Current
  2. DC – Direct Current
  3. V – Voltage
  4. I – Current
  5. P – Power
  6. R – Resistance
  7. C – Capacitance
  8. L – Inductance
  9. W – Watt
  10. Ω – Ohm (Unit of Resistance)
  11. kV – Kilovolt (1000 Volts)
  12. kW – Kilowatt (1000 Watts)
  13. kVA – Kilovolt-Ampere
  14. kVAR – Kilovolt-Ampere Reactive
  15. MW – Megawatt (1,000,000 Watts)
  16. MVA – Megavolt-Ampere
  17. AVR– Automatic Voltage Regulator
  18. BIL – Breakdown Insulation Level
  19. Hertz (Hz) – Frequency Unit (cycles per second)
  20. Wye or Star Connection – Three-phase electrical connection type
  21. Delta Connection – Another three-phase electrical connection type
  22. CT – Current Transformer
  23. PT – Potential Transformer
  24. GFCI – Ground Fault Circuit Interrupter
  25. UPS – Uninterruptible Power Supply
  26. CB – Circuit Breaker
  27. MCB – Miniature Circuit Breaker
  28. RCD – Residual Current Device
  29. FLC – Full Load Current
  30. LV – Low Voltage
  31. EMF–  Electromotive Force
  32. EHV – Extra High voltage
  33. FCU – Feeder Control unit
  34. EMI – Electro Magnetic Interference
  35. EMC – Electromagnetic Compatibility
  36. ESD –  Electrostatic Discharge
  37. HV – High Voltage
  38. MV – Medium Voltage
  39. PCB – Printed Circuit Board
  40. SWR – Standing Wave Ratio
  41. GIS – Gas Insulated Switchgear
  42. IC – Integrated Circuit
  43. dB – Decibel
  44. dBm–  Decibels relative to one milliwatt
  45. LED – Light Emitting Diode
  46. LCD – Liquid Crystal Display
  47. CRT – Cathode Ray Tube
  48. MOSFET – Metal-Oxide-Semiconductor Field-Effect Transistor
  49. BJT – Bipolar Junction Transistor
  50. FET – Field-Effect Transistor
  51. PCB – Printed Circuit Board
  52. OPAMP – Operational Amplifier
  53. DIP – Dual In-line Package
  54. SMD – Surface-Mounted Device
  55. VLSI – Very-Large-Scale Integration
  56. FPGA – Field-Programmable Gate Array
  57. ASIC – Application-Specific Integrated Circuit
  58. PWM – Pulse Width Modulation
  59. ADC – Analog-to-Digital Converter
  60. DAC – Digital-to-Analog Converter
  61. VCO – Voltage-Controlled Oscillator
  62. PLL – Phase-Locked Loop
  63. SNR – Signal-to-Noise Ratio
  64. C-MOS – Complementary Metal-Oxide-Semiconductor
  65. RF – Radio Frequency
  66. IF – Intermediate Frequency
  67. USB – Universal Serial Bus
  68. RMS – Root Mean Square
  69. ESR – Equivalent Series Resistance
  70. FWHM – Full Width at Half Maximum
  71. SPI – Serial Peripheral Interface
  72. I2C – Inter-Integrated Circuit
  73. Zener Diode – A type of diode with a specified breakdown voltage
  74. LTE – Long-Term Evolution
  75. 5G – Fifth Generation (Mobile Network)
  76. GSM – Global System for Mobile Communications
  77. CDMA – Code Division Multiple Access
  78. TDMA – Time Division Multiple Access
  79. FDMA – Frequency Division Multiple Access
  80. UMTS – Universal Mobile Telecommunications System
  81. WCDMA – Wideband Code Division Multiple Access
  82. Wi-Fi – Wireless Fidelity
  83. WiMAX – Worldwide Interoperability for Microwave Access
  84. VoIP – Voice over Internet Protocol
  85. VPN – Virtual Private Network
  86. IP – Internet Protocol
  87. ISP – Internet Service Provider
  88. LAN – Local Area Network
  89. WAN – Wide Area Network
  90. MAN – Metropolitan Area Network
  91. FDD – Frequency Division Duplex
  92. TDD – Time Division Duplex
  93. MIMO – Multiple Input, Multiple Output
  94. OFDM – Orthogonal Frequency Division Multiplexing
  95. RFID – Radio Frequency Identification
  96. DSL – Digital Subscriber Line
  97. VDSL – Very-high-bit-rate Digital Subscriber Line
  98. PBX – Private Branch Exchange
  99. BTS – Base Transceiver Station
  100. CSMA/CD – Carrier Sense Multiple Access with Collision Detection
  101. SDH – Synchronous Digital Hierarchy
  102. ATM – Asynchronous Transfer Mode
  103. GPRS – General Packet Radio Service
  104. EDGE – Enhanced Data rates for GSM Evolution
  105. HSPA – High-Speed Packet Access
  106. LNA – Low Noise Amplifier
  107. CPE – Customer Premises Equipment
  108. IPTV – Internet Protocol Television
  109. T1 – Digital Transmission Link with a rate of 1.544 Mbps
  110. T3 – Digital Transmission Link with a rate of 44.736 Mbps
  111. ADSL – Asymmetric Digital Subscriber Line
  112. BPSK – Binary Phase Shift Keying
  113. QAM – Quadrature Amplitude Modulation
  114. QPSK – Quadrature Phase Shift Keying
  115. CPU: Central Processing Unit
  116. RAM: Random Access Memory
  117. ROM: Read-Only Memory
  118. I/O: Input/Output
  119. CAD: Computer-Aided Design
  120. CAM: Computer-Aided Manufacturing
  121. AI: Artificial Intelligence
  122. IoT: Internet of Things
  123. IIoT: Industrial Internet of Things
  124. Mbps: Megabits per second
  125. Gbps: Gigabits per second
  126. THz: Terahertz
  127. GHz: Gigahertz
  128. MHz: Megahertz
  129. kHz: Kilohertz
  130. µA: Microampere
  131. mA: Milliampere
  132. kA: Kiloampere
  133. µV: Microvolt
  134. mV: Millivolt
  135. kV: Kilovolt
  136. µF: Microfarad
  137. nF: Nanofarad
  138. pF: Picofarad
  139. mH: Millihenry
  140. µH: Microhenry
  141. kΩ: Kilohm
  142. MΩ: Megohm
  143. rms: Root Mean Square
  144. p-p or pk-pk: Peak-to-Peak
  145. HV: High Voltage
  146. LV: Low Voltage
  147. ELV: Extra-Low Voltage
  148. EHV: Extra-High Voltage
  149. ANSI: American National Standards Institute
  150. IEEE: Institute of Electrical and Electronics Engineers
  151. IEC: International Electrotechnical Commission
  152. NEMA: National Electrical Manufacturers Association
  153. BIS: Bureau of Indian Standards
  154. BS: British Standard
  155. DIN: Deutsches Institut für Normung (German Institute for Standardization)
  156. ISO: International Standards Organization.
  157. ACDB: Alternating Current Distribution Board
  158. ACB: Air Circuit Breaker
  159. ALU: Arithmetic and Logic Unit
  160. ATS: Automatic Transfer Switch
  161. AVR: Automatic Voltage Regulator
  162. BJT: Bipolar Junction Transistor
  163. BLDC: Brushless DC (Motor)
  164. CC: Constant Current
  165. CFL: Compact Fluorescent Lamp
  166. CT: Current Transformer
  167. DCDB: Direct Current Distribution Board
  168. DCS: Distributed Control System
  169. DOL: Direct On Line (motor starting)
  170. ELCB: Earth Leakage Circuit Breaker
  171. GFCI: Ground Fault Circuit Interrupter
  172. HMI: Human Machine Interface
  173. HRC fuse: High Rupture Capacity fuse
  174. HT: High Tension
  175. JB: Junction Box
  176. LCB: Local Control Board
  177. LCS: Local Control Station
  178. LT: Low Tension
  179. MCB: Miniature Circuit Breaker
  180. MCC: Motor Control Centre
  181. MCCB: Moulded Case Circuit Breaker
  182. MPCB: Motor Protection Circuit Breaker
  183. NO: Normally Open
  184. NC: Normally Closed
  185. OLTC: On Load Tap Changer
  186. PB: Push Button
  187. PCC: Power Control Centre
  188. PLC: Programmable Logic Controller
  189. PT: Potential Transformer
  190. RCCB: Residual Current Circuit Breaker
  191. RCBO: Residual Current Circuit Breaker with Over-current Protection
  192. SCADA: Supervisory Control And Data Acquisition
  193. SCIM: Squirrel Cage Induction Motor
  194. SF6: Sulphur Hexafluoride (for circuit breakers)
  195. TPNDB: Three Phase and Neutral Distribution Board
  196. UPS: Uninterrupted Power Supply
  197. VCB: Vacuum Circuit Breaker
  198. VFD: Variable Frequency Drive
  199. VVVF: Variable Voltage Variable Frequency
  200. VSD: Variable Speed Drive
  201. A/D: Analog to Digital (Converter)
  202. ADC: Analog to Digital Converter
  203. ASIC: Application-Specific Integrated Circuit
  204. BGA: Ball Grid Array
  205. BIOS: Basic Input/Output System
  206. CMOS: Complementary Metal-Oxide Semiconductor
  207. CRT: Cathode Ray Tube
  208. DAC: Digital to Analog Converter
  209. DIP: Dual In-line Package
  210. DMA: Direct Memory Access
  211. DRAM: Dynamic Random Access Memory
  212. DSP: Digital Signal Processor
  213. EEPROM: Electrically Erasable Programmable Read-Only Memory
  214. EPROM: Erasable Programmable Read-Only Memory
  215. FET: Field-Effect Transistor
  216. FPGA: Field-Programmable Gate Array
  217. GPIO: General-Purpose Input/Output
  218. GPU: Graphics Processing Unit
  219. JFET: Junction Field-Effect Transistor
  220. LCD: Liquid Crystal Display
  221. LED: Light-Emitting Diode
  222. MOSFET: Metal-Oxide-Semiconductor Field-Effect Transistor
  223. MUX: Multiplexer
  224. NAND: Not AND (logic gate)
  225. NOR: Not OR (logic gate)
  226. NTC: Negative Temperature Coefficient
  227. OLED: Organic Light-Emitting Diode
  228. PROM: Programmable Read-Only Memory
  229. PTC: Positive Temperature Coefficient
  230. PWM: Pulse-Width Modulation
  231. SRAM: Static Random Access Memory
  232. SoC: System on Chip
  233. THM: Through-Hole Mounting
  234. THT: Through-Hole Technology
  235. VLSI: Very Large Scale Integration
  236. 2G/3G/4G/5G: Second/Third/Fourth/Fifth Generation (mobile technology)
  237. ADSL: Asymmetric Digital Subscriber Line
  238. AM: Amplitude Modulation
  239. API: Application Programming Interface
  240. ATM: Asynchronous Transfer Mode
  241. BGP: Border Gateway Protocol
  242. BER: Bit Error Rate
  243. BSC: Base Station Controller
  244. BSS: Base Station Subsystem
  245. BTS: Base Transceiver Station
  246. OS : Operating System
  247. COMPUTER: common Operated Machine Particularly used for Technical Education & Research
  248. OK : objection Killed
  249. GPS : Global Positioning system
  250. CATV: Cable Television / Community Antennae Television
  251. CBR: Constant Bit Rate
  252. CD : Compact Disc
  253. CDMA: Code Division Multiple Access
  254. CDN: Content Delivery Network
  255. CPE: Customer Premises Equipment
  256. CSMA/CD: Carrier Sense Multiple Access with Collision Detection
  257. DSL: Digital Subscriber Line
  258. DWDM: Dense Wavelength Division Multiplexing
  259. FDM: Frequency Division Multiplexing
  260. FM: Frequency Modulation
  261. FTTC: Fiber-to-the-Cabinet
  262. FTTH: Fiber-to-the-Home
  263. FTTN: Fiber-to-the-Node
  264. FTTP: Fiber-to-the-Premises
  265. FTTx: Fiber to the X (general term for fiber deployment)
  266. HFC: Hybrid Fiber Coax
  267. ISP: Internet Service Provider
  268. IMEI : International Mobile Equipment Identity
  269. HS : Hotspot
  270. ISDN: Integrated Services Digital Network
  271. LAN: Local Area Network
  272. DP : Display Picture
  273. WiFi : Wireless Fidelity
  274. ATM : Automated Teller Machine
  275. USB : Universal serial Bus
  276. LTE: Long-Term Evolution
  277. GPRS : General Packet Radio Service
  278. MMF: Multi-Mode Fiber
  279. MPLS: Multiprotocol Label Switching
  280. NOC: Network Operations Center
  281. ONT: Optical Network Terminal
  282. ONU: Optical Network Unit
  283. OUI: Organizationally Unique Identifier
  284. PCM: Pulse Code Modulation
  285. POTS: Plain Old Telephone Service
  286. PSTN: Public Switched Telephone Network
  287. QAM: Quadrature Amplitude Modulation
  288. RF: Radio Frequency
  289. SDH: Synchronous Digital Hierarchy
  290. SIM: Subscriber Identity Module
  291. SIP: Session Initiation Protocol
  292. SLA: Service Level Agreement
  293. SMF: Single-Mode Fiber
  294. SMS: Short Message Service
  295. SONET: Synchronous Optical Network
  296. TCP/IP: Transmission Control Protocol/Internet Protocol
  297. TDM: Time Division Multiplexing
  298. UMTS: Universal Mobile Telecommunications System
  299. VoIP: Voice over Internet Protocol
  300. WAN: Wide Area Network
  301. WDM: Wavelength Division Multiplexing
  302. Wi-Fi: Wireless Fidelity
  303. WLAN: Wireless Local Area Network
  304. WLL: Wireless Local Loop
  305. WWW : World Wide Web
  306. DVD : Digital Versatile Disc
  307. HDMI : High Definition Multimedia Interface
  308. ETC : et cetera

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