Full form of......

1. PAN - permanent account number.

 2. PDF - portable document format.

 3. SIM - Subscriber Identity Module.

 4. ATM - Automated Teller machine. 

5. IFSC - Indian Financial System Code.

 6. FSSAI(Fssai) - Food Safety & Standards Authority of India. 

7. Wi-Fi - Wireless fidelity. 

8. GOOGLE - Global Organization Of Oriented Group Language Of Earth. 

9. YAHOO - Yet Another Hierarchical Officious Oracle. 

10. WINDOW - Wide Interactive Network Development for Office work Solution. 

11. COMPUTER - Common Oriented Machine. Particularly United and used under Technical and Educational Research. 

12. VIRUS - Vital Information Resources Under Siege. 

13. UMTS - Universal Mobile Telecommunications System.

 14. AMOLED - Active-matrix organic light-emitting diode. 

15. OLED - Organic light-emitting diode. 

16. IMEI - International Mobile Equipment Identity. 

17. ESN - Electronic Serial Number. 

18. UPS - Uninterruptible power supply. 

19. HDMI - High-Definition Multimedia Interface.

 20. VPN - Virtual private network. 

21. APN - Access Point Name. 

22. LED - Light emitting diode.

 23. DLNA - Digital Living Network Alliance. 

24. RAM - Random access memory.

 25. ROM - Read only memory.

 26. VGA - Video Graphics Array. 

27. QVGA - Quarter Video Graphics Array. 

28. WVGA - Wide video graphics array. 

29. WXGA - Widescreen Extended Graphics Array. 

30. USB - Universal serial Bus.

 31. WLAN - Wireless Local Area Network. 

32. PPI - Pixels Per Inch.

 33. LCD - Liquid Crystal Display. 

34. HSDPA - High speed down-link packet access. 

35. HSUPA - High-Speed Uplink Packet Access. 

36. HSPA - High Speed Packet Access. 

37. GPRS - General Packet Radio Service. 

38. EDGE - Enhanced Data Rates for Global Evolution. 

39. NFC - Near field communication.

 40. OTG - On-the-go. 

41. S-LCD - Super Liquid Crystal Display. 

42. O.S - Operating system. 

43. SNS - Social network service.

 44. H.S - HOTSPOT.