1.) PAN – Permanent Account Number
2.) PDF – Portable Document Format
3.) SIM – Subscriber Identity Module
4.) ATM – Automated Teller Machine
5.) Wi-Fi – Wireless fidelity
6.) GOOGLE – Global Organization Of Oriented Group Language Of Earth
7.) YAHOO – Yet Another Hierarchical Officious Oracle.
8.) WINDOW – Wide Interactive Network Development for Office work Solution
9.) COMPUTER – Common Oriented Machine. Particularly United and used under Technical and Educational Research
10.) VIRUS – Vital Information Resources Under Siege
11.) UMTS – Universal Mobile Telecommunications System
12.) AMOLED – Active-Matrix Organic Light-Emitting Diode
13.)OLED – Organic Light-Emitting Diode
14.) IMEI – International Mobile Equipment Identity
15.) ESN – Electronic Serial Number
16.) UPS – Uninterruptible Power Supply.
17.) HDMI – High-Definition Multimedia Interface.
18.) VPN – Virtual Private Network
19.) APN – Access Point Name
20.) LED – Light Emitting Diode
21.) DLNA – Digital Living Network Alliance
22.) RAM – Random Access Memory
23.) ROM – Read Only Memory