Editing Personal Jukebox (section)

===Development===
The PJB was created as a personal audio appliance prototype by [[DEC Systems Research Center]] and Palo Alto Advanced Development group (PAAD). The project started in May 1998, a month before the [[Digital Equipment Corporation]] merger into Compaq was completed, and a final product was brought to market in November 1999. The PJB was the first hard-disk-based MP3 player made available on the market.

The "100" in the "PJB-100" name was chosen from the capacity of the original 4.86&nbsp;GB hard drive in the first Personal Jukebox. With this drive, the unit was expected to hold about 100 popular (45 minute) music CDs encoded at 128&nbsp;kbit/s. The name was kept for the later models with bigger hard drives, even though these could store a larger number of albums.

The PJB-100 was the first MP3 portable to garner a "Milestone" product designation from [[MP3 Newswire]], which they defined in their January 2000 review of the PJB-100 as "any product whose breakthrough innovations are so significant, they influence the future course of its industry".