Virtual key,Physical key
1. internet,internet
2. network ,internet
3. operating system,operating_system
4. os,operating_system
5. dos,operating_system
6. windows,operating_system
7. unix,operating_system
8. linux ,operating_system
9. lan,lan
10. local area network,lan
11. internet,lan
12. intranet ,lan

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End of processing