, Altair Engineering, Inc. Scapa, president and
CEO of Altair Engineering. For detailed information about Altair, visit http://www .energiasdobrasil. Energias do Brasil's
distribution companies are located in regions with high-growth profiles:
Bandeirante (Sao Paulo State), Escelsa (Espirito Santo State) and Enersul
(Mato Grosso do Sul State), providing service to approximately 2. NEENAH, Wis.com

** Please contact Kristian to switch from fax to email distribution **

About Plexus Corp.

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As the developer of Altair(R) HyperWorks(R) - The
Engineering Framework for Product Design(TM), Altair is the leading provider
of high-end, open CAE software solutions for modeling, visualization,
optimization and process automation.

Webcast Alert: Energias do Brasil Announces Fourth Quarter 2005 Results

The energy trading company,
Enertrade, negotiated a total of 4,849 GWh in 2004, ranking as the
second-largest private electricity trader in Brazil.

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Those
customers include strategic international accounts such as Fiat, Ford, GM,
John Deere, ArvinMeritor and Nokia.
"Altair has built a strong reputation for providing our customers with the
highest quality service in the industry," said James R."
The new facility is the twelfth Altair office worldwide and further
demonstrates Altair 's energetic global growth strategy.m.idmc.br/prnewswire/index.
Eastern Time.'s Fiscal Q1 Earnings Conference Call

When: Wednesday, January 26th, 2005 at 8:30 a.
Plexus provides award-winning customer service to more than 150 branded
product companies in North America, Europe and Asia.

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Altair Engineering Establishes Brazil Office

Valdir Mendes Cardoso is the technical
manager of Altair Engineering do Brasil, and will oversee operations at the
new facility. The company's grid computing software,
PBS Professional(TM), is a workload management solution for HPC environments ,
Linux clusters and desktop cycle harvesting that delivers an ROI within one
year. Senior management will host a live webcast and
conference call reviewing the results on Wednesday, January 26th at 8:30 a.plexus. Plexus specializes in customer programs that require
flexibility, scalability, technology and quality.

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, a global
leader in innovative product development, advanced engineering software and
grid computing technology, today announced that it has established a regional
office in the city of Sao Caetano do Sul, Sao Paulo, Brazil. Having an office in
Brazil also recognizes that country 's growing economy and its emergence as one
of the world's most vibrant design centers. The toolset is a proven industry leader, and
delivers the fastest and most versatile meshing and assembly technologies for
finite-element and multi-body systems simulation.com/
or via telephone replay at 877-519-4471 or 973-341-3080
PIN: 5578617

Contact: Kristian Talvitie , 920-969-6160, kristian.

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Contact: Investor Relations
Energias do Brasil
+011-5511-2185-5976
ri@energiasdobrasil.br .

- The Product Realization Company
Plexus ( http://www.com ) participates in the Electronics
Manufacturing Services (EMS) industry providing product design, test,
manufacturing, fulfillment and aftermarket solutions to branded product
companies in the networking, datacommunications, medical, industrial ,
commercial, defense and computer industries.

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Sao Paulo facility is latest evidence of company's global expansion strategy

TROY, Mich. Altair
Engineering do Brasil will provide sales and technical support for the
company's HyperWorks(R) suite of advanced product design and engineering
software tools to regional manufacturers and the engineering community.plexus.

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Altair(R) HyperWorks (R)
HyperWorks is a highly integrated framework of engineering tools that
provides complete , open-architecture computer-aided engineering (CAE) and
process automation support.altair. SAO PAULO, Brazil, Energias do Brasil
(Bovespa: ENBR3) announces the following Webcast:

What: Energias do Brasil Fourth Quarter 2005 Results

When: Thursday, February 23, 2006 , at 12:00 p.asp?Palestra_ID=199

How: Live over the Internet --
Simply log on to the web at the address above.9 million
customers located in 171 municipalities, with a combined population of
9., Plexus Corp.m. Eastern

Where: 877-234-1973 or 973-935 -8412 with conference ID: Plexus
http://ir.
The Company's unique Focused Factory manufacturing model and global supply
chain solutions are strategically enhanced by value-added product design and
engineering services.

world passatempos

"The Sao Paulo office will enhance the level of
collaboration with our Brazilian customers that is so important to drive
innovation in product design and engineering . EST

Where: http://webcast3.com.br

If you are unable to participate during the live Webcast, the call will be
archived at http://www.
(Nasdaq: PLXS) today announced it will release its fiscal 2005 first quarter
results for the period ended January 1, 2005, on Tuesday, January 25th after
the stock market closes.

What: Plexus Corp.plexus.talvitie@plexus.

world desportos

com .

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To access the replay, click
on Investor Relations Section. The Company is controlled by EDP -- Energias de Portugal
Group, the biggest non-financial Portuguese group.

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About Altair Engineering
Through product design consulting, advanced engineering software and high-
performance computing (HPC) technologies, Altair Engineering increases
innovation for clients around the globe.

Energias do Brasil is a holding company that integrates assets in the
activities of generation , distribution and trading of electricity in the
Brazilian market.m.com/
(requires Windows Media Player)

Replay: The call will be archived until February 02, 2005 at
http://ir.

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Founded in 1985 and privately held
with offices throughout 12 countries , Altair's unparalleled knowledge and
expertise in product development and manufacturing extend throughout North
America, Europe and Asia.com.6 million.

Plexus Q1 Earnings Release on January 25th After Market Close and Conference Call on January 26th at 8:30 AM E.T.

am nis

com. The stakes in generating plants provide a current installed
capacity of 531 MW, which are going to be expanded by an additional 527 MW
through the construction of Peixe Angical Hydro Plant and two other generation
projects due to go into operation in 2006.