Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Charlene Rhinehart is a CPA , CFE, chair of ...

Created by two programmers named Basit and Amjad, Brain was a boot virus that ran when a computer was booted up with an infected floppy diskette in the A: drive. (Remember when floppy disks were ...