Biography: Marcos Alberto de Souza is a Senior System Analyst acting as resident SE for NEC Corporation through NEC do Brasil at INPE/CPTEC since 1994. One year later he started in the scientific computing area working for 6 months in Tokyo with the Supercomputer SX-3 Series. Always working with NEC systems he managed and closely worked with the SX-4 and SX-6 systems. He joined NEC do Brasil in 1987 where started as System Analyst working with UNIX systems for scienfic processing since 1991.