Editing Personal Jukebox (section)

==History==

===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".

===Licensing, marketing and distribution===
Instead of manufacturing the player themselves, Compaq licensed the design to HanGo, which called it the ''"Personal Jukebox - PJB-100"''. The license from Compaq to HanGo was worldwide exclusive - nobody else could license the technology from Compaq during the term of the HanGo license. HanGo granted a distribution agreement to US company Hy-Tek Manufacturing of [[Sugar Grove, IL]] in 2001. HanGo rebranded the units sold through Hy-Tek as the ''"Compressor"''.

HanGo took the PJB-100 into mass production and introduced it to the public at the Las Vegas COMDEX in November 1999. The first units were sold in a special auction held by [[MP3.com]], with bids exceeding [[US$]]1000. Some winners received their players before the end of 1999. The first auctioned units were hand-built by the Compaq engineers who designed it and had single-digit serial numbers.