The first computer virus in the Philippines is the ILOVEYOU virus, also known as the Love Bug or Loveletter virus. It was created by a Filipino computer programmer named Onel de Guzman, who incorporated the virus into the source code he submitted for his final thesis while studying as an undergraduate computer student at the AMA Computer College. The virus emerged on May 4, 2000, and quickly spread globally, affecting millions of computer systems worldwide. The ILOVEYOU virus is a worm, not a virus, and it can self-replicate and spread independently across multiple systems without requiring a host file for activation. The virus was sent as an attachment in an email with the word "ILOVEYOU" in the subject line. When opened, the attachment caused the message to be sent again to everyone in the recipients Microsoft Outlook contact book, and all JPEG, MP3, and specific other files on the hard drives of all receivers were lost. The ILOVEYOU virus can spread quickly within a company because Microsoft Outlook is frequently set up as the default email management tool on business networks around the world.