PC PAINTBRUSH

'PC Paintbrush' (also known simply as 'Paintbrush') was graphics editing software created by the ZSoft Corporation in 1985 for computers running the MS-DOS operating system.
It was originally developed as a response to the first paintbrush program for the IBM PC, ''PCPaint'' which had been released the prior year by ''Mouse Systems'', the company responsible for bringing the mouse to the IBM PC for the first time.
In 1984 ''Mouse Systems'' had released ''PCPaint'' to compete with Apple Paint on the Apple II computer and was already positioned to compete with ''MacPaint'' on Apple Computer's new Macintosh platform. Unlike ''MacPaint, ''PCPaint'' enabled users to work in color.
When Paintbrush was released the following year ''PCPaint'' had already added support for the PC's 16 color EGA (Enhanced Graphics Adapter) and Paintbrush followed with the PC's advantage of EGA support as well.
Also following the lead of Mouse Systems and PCPaint (one of the first pieces of software to use a mouse on the PC), the earliest versions of Paintbrush were distributed (by Microsoft) with a mouse included.
Both Microsoft and their competitor ''Mouse Systems'' bundled their mice with Mouse System's ''PCPaint'' the prior year. In Christmas 1984, amidst record sales volumes in the home computer market, Microsoft had created a "sidecar" bundle for the PCJr complete with their mouse but with their competitor's product ''PCPaint''. With the release of Paintbrush the following year, Microsoft no longer needed to sell their competitor's software to have the same market advantage.
Microsoft's mechanical mice out-sold Mouse Systems optical mice after a few years, but ''PCPaint'' outsold Paintbrush until the late 1980s.
Unlike most other applications before and since, ''Paintbrush'' version numbers were recorded with Roman numerals.
Along with the release of ''Paintbrush'', ZSoft, following in the footsteps of PCPaint's Pictor PIC format, the first popular image format for the PC, created the PCX image format.
The first version of ''Paintbrush'' only allowed the use of a limited EGA 16 color palette. By version III 256 colors and extended SVGA resolutions were supported through the use of hundreds of custom tailored graphics drivers. The PCX format grew in ability accordingly. By its final version ''Paintbrush'' was able to open and save PCX, TIFF, and GIF formats.

''Paintbrush'' was later adapted to the Windows 3.1 operating system as ''Publisher's Paintbrush. Publisher's Paintbrush'' allowed importation of images via TWAIN based capture devices like hand-held and flatbed scanners. Support for 24-bit color and simple photo retouching tools were also added as well as the ability to open more than one image at a time. It also added support for many simulations of real-world media such as oil paints, watercolors, and colored pencils, and a number of new smudge tools that took advantage of the increaded color depth. Both ''PC Paintbrush'' and ''Publishers Paintbrush'' were supplemented and later replaced with the more budget oriented ''PhotoFinish''.
After ZSoft was sold, resold, and then finally absorbed by The Learning Company an extremely low priced and simple graphics application was released under the title ''PC Paintbrush Designer''.

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References

Mouse Systems
http://en.wikipedia.org/wiki/Mouse_Systems