A family of Microsoft word processing software products for creating web, email, and print documents.
Office has nothing to do with the fact that you are getting spam.
There are several ways you can get onto spam lists:
- you provided your email address by signing up for something you shouldn't have
- a friends computer was hacked and their "contacts" list was collected by spammer
- you provided your email address on a comment or other public part of the internet where a spammer was able to copy it
Once a spammer figures out that your email address is "good", say by you unsubscribing from a spam email, they sell it to other spammers, increasing the amount of spam you get.