SISNE plus – a MS-DOS 3.3 based operating system developed by Itautec.
Itautec is a Brazilian electronics company that was founded in 1979. The company is part of Itaúsa, which is one of the largest private Brazilian business group by sales volume.
The SISNE plus OS was discontinued in 1988.
SISNE plus 3.30r05 i386 456KB.zip