From Newcon Data:
The software product TessEm emulates the ABB (originally ASEA) TESSELATOR family of color graphic systems. It runs on a standard PC under the Microsoft Windows XP or Windows 2000 operating systems. By using a standard PC with the Windows XP or Windows 2000 operating system the software emulator has the ability to take advantage of the myriad of peripheral equipment available on the market from third party vendors. Thus the user is free to select I/O devices such as monitors, keyboards, printers, and so on, but still keep the unique TESSELATOR functionality.