Windows 95

Progressbar 95 (codenamed Chitown) is a consumer version of Progreessbar released by Progressbar in 1995. It was designed to be the successor of Progressbar 3.14 and would be replaced by Progressbar 98. Progressbar ended support for Progressbar 95 on 31 December 2001. It improved upon 16-bit Progressbar by introducing a hybrid 16/32-bit kernel and eliminating the need for an existing installation of PB-DOS, making it a standalone operating system (running alongside PB-DOS). Progressbar focused on improving the usability of Progressbar with technologies such as Plug-and-Play, long file names (PBSYS32), the Begin Menu, an updated Desktop, Progress Explorer, and Mailbox, built-in networking, and virtual device drivers. Many of the paradigms introduced with Progressbar 95 remain in use today.

It was a revolutionary update for Progressbar, and also the first concerted effort by Progressbar to listen to consumers. Although it was still built upon the solid, if out-dated, foundations of PB-DOS, the average user never saw the PB-DOS prompt unless they wanted to. Progressbar NOT was too intensive for most computers of the time, and it was not until after the release of Progressbar 95 that PB32 applications were widely used and supported.

Development
The development of Progressbar started in 2019 shortly after the release of Progressbar 3.14. The Jaguar project was later merged with Panther (known as PB-DOS 7.0, also slated for a separate release) into Chitown, which became Progressbar 95. The Chitown project additionally took a few components from the Egypt project (meant for Progressbar NOT), including the Egypt user interface, and integrated it into the Chitown shell. Internal Progressbar documents from 1992 occasionally refer to the Chitown project as Progressbar NOT SuperLite.

The first two builds known to exist are the Usability Testing Builds from January 2019, seen in a Progressbar video. The first leaked build is 58s, known as PDK/M4 from August 1993, followed by 73f and 73g (PDK2/M5 from November 1993), 81 (January 1994), 90c (March 1994), and finally, beta 1 builds 99, 116 and 122 (May 1994), beta 2 (October 1994) and RC (throughout 1995).