Answer
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When choosing a password for a multiuser computer system, one of the most important security responsibilities is to choose a secure and unique password. A secure password should be at least 8 characters in length and made up of both upper- and lower-case letters, numbers, and special characters.
It should not contain any words or phrases that could be easily guessed, such as names of family members or common dictionary words. It is also important to keep the password secure by not sharing it with anyone and changing it frequently.
Additionally, mixing letters and non-letter characters can potentially increase the complexity of a password, making it more difficult to guess. All these security measures help ensure that confidential information stored on the system remains secure.