Important Abbreviations and their Full Form - P to Z

Short Name	Full Form or Abbreviations
PIN	Postal Index Number
PSLV	Polar Satellite Launch Vehicle
PWD	Public Works Department;
R&D	Research and Development
RADAR	Radio Detecting and Ranging
RAM	Random Access Memory
RAW	Research & Analysis Wing
RBI	Reserve Bank of India
RDX	Research Department Explosive (Cyclotrim-ethylin Trinitrate)
RISC	Reduced instruction-set computing
RNA	Ribonucleic acid
ROM	Read Only Memory
RPM	Revolutions Per Minute
RTI	Right to Information
SAIL	Steel Authority of India Limited
SARS	Severe Acute Respiratory Syndrome
SCSI	Small Computer Systems Interface
SEBI	Securities and Exchange Board of India
SENSEX	Sensitivity Index (of Share Price)
SEZ	Special Economic Zone
SGPC	Siromani Gurudwara Prabandak Committee
SIM	Subscriber Information Module
SLV	Satellite Launch Vehicle
SMS	Short Message Service
SMTP	Simple Mail Transfer Protocol
STD	Subscriber Trunk Dialling; Sexually Transmitted Diseases
TADA	Terrorist and Disruptive Activities (Prevention) Act
TCP	Transfer Call Protocol Transmission Control Protocol
TELCO	Tata Engineering and Locomotive Company
TFT	Thin-Film Transistor
TIFR	Tata Institute of Fundamental Research
TISCO	Tata Iron and Steel Company
TOEFL	Test of English as a Foreign Language
UAV	Unmanned Aerial Vehicle
UGC	University Grants Commission
ULFA	United Liberation Front of Asom
UNESCO	United Nations Educational, Scientific and Cultural Organi-sation
UNI	United News of India
UNICEF	United Nations International Children's Emergency Fund (now, 'United Nations Children's Fund')
UNU	United Nations University
UPA	United Progressive Alliance
UPSC	Union Public Service Commission
URL	Uniform Resource Locator
VAT	Value Added Tax
VCR	Video Cassette Recorder
VIP	Very Important Person
VIRUS	Vital Information Resources Under Siege
VRML	Virtual Reality Modelling Language
VRS	Voluntary Retirement Scheme
VSSC	Vikram Sarabhai Space Centre
WHO	World Health Organisation
WMO	World Meteorological Organisation
WTO	World Trade Orga-nisation
WWF	World Wildlife Fund
WWW	World Wide Web
WYSIWYG	What you see is what you get
XML	Extensible Mark-up Language
YMCA	Young Men's Christian Association
ZIP	Zone Improvement Plan