IBM zSeries
eServer zSeries
IBM eServer zSeries is a brand name of IBM which was
designated to all IBM mainframes in 2000 with the e depicted in IBM's
well-known red trademarked symbol.(dubious assertion—see talk page)
Nonetheless, IBM didn't give the previous servers of the same line
(being called IBM S/390) new names, so the term zSeries now popularly
refers only to IBM's first line of 64-bit mainframes, starting with the
first model of the new 64-bit mainframes the IBM zSeries 900 or, for
short, z900. The z900 was (compared to its predecessors) a very
powerful machine which introduced 64-bit computing into the mainframe
world using the newly-designed z/Architecture. At the same time, the
new servers provided more than twice the performance of previous models.
In July 2005, IBM rebranded the server line again, to System z,
but again not renaming previous servers. At the same time IBM
announced a new brand name (System z9) using it to announce the
latest generation System z9-109 servers. (See System z9 for
information on the successor models to zSeries.)
The IBM eServer zSeries line succeeded the IBM System/390 (S/390
for short) which were based on the ESA/390 architecture while
ensuring full compatibility to it. Thus, zSeries servers are the
direct, lineal descendents of the IBM System/360, announced in
1964, and the 1970s System/370. Applications written for the
24-bit-addressing/32-bit-data System/360 can still run, unmodified,
on the newest System z9 over four decades later, with few exceptions.
The term "zSeries" is still the most popular way to refer to all
IBM mainframe servers, probably because as of 2006 the old S/390
IBM mainframe servers can be considered history. In its 64-bit
mode the new CPU become free from the legacy of the 31-bit addressing
limits of its predecessors.
Excerpt from "IBM zSeries." Wikipedia, The Free Encyclopedia.
21 Oct 2006, 15:10 UTC. Wikimedia Foundation, Inc. 27 Oct 2006
http://en.wikipedia.org/w/index.php?title=IBM_zSeries&oldid=82820810 IBM
International Business Machines Corporation (IBM, or
colloquially, Big Blue; NYSE: IBM) is a computer technology firm
headquartered in Armonk, NY, USA. The company, which was founded in
1888 and incorporated June 15, 1911, manufactures and sells computer
hardware, software, infrastructure services, hosting services, and
consulting services. IBM is the biggest information technology company
in the world and holds more patents than any other tech company.
With almost 332,000 employees worldwide and revenues of $91 billion
annually (figures from 2005), IBM is also one of the few information
technology companies with a continuous history dating back to the 19th
century. It has engineers and consultants in over 170 countries and
development laboratories located all over the world, in all segments
of computer science and information technology; some of them are
pioneers in areas ranging from mainframe computers to nanotechnology.
Excerpt from 'IBM' Wikipedia, The Free Encyclopedia.
23 May 2006, 07:37 UTC. 15 May 2006, 12:35
http://en.wikipedia.org/wiki/IBM
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