The article below provides a good description breakdown of what a laser printer drum (or imaging unit) is and its role in the laser printing process. It also points out just how important this component is. Because this component is crucial to your printer’s functionality, certain care should be taken when handling it.
 

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May 15, 2017 From the AP
TOKYO - Global cyber chaos is spreading Monday as companies boot up computers at work following the weekend's worldwide "ransomware" cyberattack.

The extortion scheme has created chaos in 150 countries and could wreak even greater havoc as more malicious variations appear. The initial attack, known as "WannaCry," paralyzed computers running Britain's hospital network, Germany's national railway and scores of other companies and government agencies around the world.

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