Plurix

Plurix was developed in the Federal University of Rio de Janeiro (UFRJ), at the Electronic Computing Center (NCE).

The NCE researchers, after returning from postgraduate courses in the US, attempted to license the UNIX source code from AT&T in the late 1970s without success.

The NCE/UFRJ also offered technical courses on OS design and implementation to local computer companies, some of which later produced their own proprietary UNIX systems.

A new president was elected after twenty years of a military dictatorship, and his first act was to terminate the laws that ruled the Brazilian IT market protection for hardware, software, and later everything else.

MULTIPLUS is a distributed shared-memory multiprocessor designed to have a modular architecture, which is able to support up to 1024 processing elements and 32 GB of global memory address space.

Developed by a group of volunteers, (like Linux), Tropix is a fully preemptive real-time Unix-like operating system for PCs.