some important word for knowing computer

13. VPN - Virtual private network.
14. APN - Access Point Name.
15. SIM - Subscriber Identity Module.
16. LED - Light emitting diode.
17. DLNA - Digital Living Network Alliance.
18. RAM - Random access memory.
19. ROM - Read only memory.
20. VGA - Video Graphics Array.
21. QVGA - Quarter Video Graphics Array.
22. WVGA - Wide video graphics array.
23. WXGA - Widescreen Extended Graphics Array.
24. USB - Universal serial Bus.
25. WLAN - Wireless Local Area Network.
26. PPI - Pixels Per Inch.
27. LCD - Liquid Crystal Display.
28. HSDPA - High speed down-link packet access.
29. HSUPA - High-Speed Uplink Packet Access.
30. HSPA - High Speed Packet Access.