ISO = International Organization for Standardization
ايزو – سازمان جهاني استاندارد                                                                                  
ICU = Intensive Care Unit
بخش مراقبت هاي ويژه
AIDS = Acquired Immune Deficiency Syndrome
بيماري ايدز- سندرم ازبين برنده امنيت دفاعي بدن                                                         
ISBN = International Standard Book Number
شماره استاندارد بين المللي كتاب                                                                               
OPEC = Organization of Petroleum Exporting Countries
اوپك- سازمان كشورهاي صادركننده نفت                                                                       
IRNA = Islamic Republic News Agency
ايرنا – خبرگزاري جمهوري اسلامي                                                                                
ISNA = Iranian Student News Agency
ايسنا – خبرگزاري دانشجويان ايران                                                                                
TOEFL = Test of English as a Foreign Language
آزمون تافل
IELTS = International English Language Testing System

آزمون آيلتس
UNESCO = United Nations Educational Scientific and Cultural Organization
يونسكو – سازمان آموزش علمي وفرهنگي ملل متحد                                                       
UNICEF = United Nations Children’s Fund / United Nations International Children's Emergency Fund 
يونيسف – صندوق اضطراري سازمان ملل متحدبراي كودكان                                                 
PIN = Personal Identification Number
شماره شناسايي شخصي
SIM card = SIM is the abbreviation of  Subscriber Identification Model
مدل شناسايي مشترك