Computer Basic Information
In case of MS-EXCEL, If you begin typing an entry into a cell and then realize that you don't want your entry placed into that cell, you:

Press the Enter button
Press the Erase key
Press the Edit formula button
None of these
Press Esc

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Computer Basic Information
Impact printers

are more expensive than Laser printers
None of these
use optical technology
strike a ribbon against the paper to produce character images
include ink-jet and thermal devices

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