| 1998 | Internet weblogs begin to appear. |
| 1998 | Intel releases the Celeron processor. |
| 1998 | Compaq Computer purchases Digital Equipment Corporation for $9.6 billion on January 26, 1998. |
| 1998 | Hearings open between Microsoft and the U.S. Department of Justice to whether Microsoft has a monopoly on the software market. |
| 1998 | The DMCA is passed. |
| 1998 | ATA-4 is approved by ANSI. |
| 1998 | Lite-on is founded. |
| 1998 | eMachines is founded. |
| 1998 | 3DNow! is introduced by AMD. |
| 1998 | Sun releases the JavaStation |
| 1998 | Netscape releases Navigator 5.0 as well as revealing its complete source code for Navigator on its Web site and announces that AOL will stop developing and supporting Netscape February 1, 1998. |
| 1998 | Bill Gates, is hit in the face with a cream pie. |
| 1998 | During the demonstration of a pre-release copy of Windows 98 at Comdex Bill Gates and an assistant demonstrate how to install a scanner. During the demonstration Windows 98 caused an error message. |
| 1998 | V.90 modem standard is announced and agreed on February 6, 1998 |
| 1998 | Sun Microsystems begins shipping the JavaStation in March of 1998. |
| 1998 | Saehan's MPMan becomes the first MP3 player released in Japan to the public in spring of 1998. |
| 1998 | The CIH virus also known as Chernobyl virus is created and begins infecting computers and starts executing one year later on April 26, 1999 the same day as the Chernobyl accident in Ukraine on April 26, 1986. |
| 1998 | SETI@Home is introduced on June 8, 1998. |
| 1998 | Microsoft Windows 98 is officially released on June 25, 1998. |
| 1998 | The "Solar Sunrise" attack is launched by two teenager hackers and gives them access to more than 500 military government computers. |
| 1998 | Google is founded by Sergey Brin and Larry Page September 7, 1998. |
| 1998 | The CST is initiated by ETA. |
| 1998 | AMR is released September 9, 1998 |
| 1998 | Rockstar Games is founded. |
| 1998 | MySQL is introduced. |
| 1998 | PayPal is founded. |
| 1998 | Amazon purchases IMDb. |
| 1998 | Apple introduces the iMac, the iMac helps bring Apple back on the computer maps as a very easy and friendly computer. |
| 1998 | Award, well known for its computer BIOS becomes part of Phoenix, another company well known for its computer BIOS. |
| 1998 | In October of 1998 Microsoft announced that future releases of Windows NT would no longer have the initials of NT and that the next edition would be Windows 2000. |
| 1998 | Computer Hope is established in November 1998. |
