What are the Example of program virus?

1. Melissa (1999): Melissa was a macro virus that spread via email attachments. It infected Microsoft Word documents and sent copies of itself to everyone in the infected user's address book. Melissa caused widespread disruption to businesses and government agencies, and is estimated to have caused billions of dollars in damages.

2. ILOVEYOU (2000): ILOVEYOU was a worm that spread via email attachments. It disguised itself as a love letter and tricked users into opening it. Once opened, the worm would infect the user's computer and send copies of itself to everyone in the user's address book. ILOVEYOU infected millions of computers worldwide and caused significant damage to businesses and government agencies.

3. Code Red (2001): Code Red was a worm that exploited a vulnerability in Microsoft IIS web servers. It infected millions of computers worldwide and caused significant disruptions to websites and online services. Code Red was also responsible for the spread of the Nimda worm, which infected millions more computers.

4. Nimda (2001): Nimda was a worm that spread via email attachments, shared folders, and web pages. It infected millions of computers worldwide and caused significant disruptions to websites and online services. Nimda was also responsible for the spread of the Klez worm, which infected millions more computers.

5. Slammer (2003): Slammer was a worm that exploited a vulnerability in Microsoft SQL Server. It infected millions of computers worldwide and caused significant disruptions to networks and online services. Slammer was also responsible for the spread of the Sapphire worm, which infected millions more computers.