Final answer:
Spam refers to unsolicited commercial e-mail used to promote products or services. It is not a Usenet archive, computer virus, or encryption algorithm. Individuals can reduce spam by using filters and reporting unwanted messages.
Step-by-step explanation:
Spam refers to unsolicited commercial e-mail, where individuals or businesses send out bulk messages to a large number of recipients without their consent. It is often used to promote products or services.
Spam is not a Usenet archive, a computer virus, or an encryption algorithm. Usenet archives are collections of messages and discussions, computer viruses are malicious software that can harm computer systems, and encryption algorithms are used to secure data.
By using filters and reporting spam, individuals can reduce the amount of unwanted messages in their inbox.