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In previous blog postings, I've attempted to pique your interest in the rapid technological changes that are transforming the data centers that we all rely on. Very soon these changes will revolutionize how folks around the world will use the Internet and what they will be able to do with it.

You don't have to just take my word for it, though. Tomorrow (Wednesday, 9/29) Cisco Systems will host a live Internet TV broadcast and Q&A session to discuss its vision for Data Center 3.0 and how the company's core technologies and new solutions are mapping to its overall corporate business strategy. Best of all, you don't have to be anyone special to attend. The session will be distributed free to all. No registration required. Just visit the event URL at 10:00 a.m. PDT and select "Play" to launch the live presentation.

Presenters will include:

Rajiv Ramaswami, vice president and general manager of the Data Center Switching Technology Group, will discuss how storage networking technology is evolving, including a glimpse at Cisco's future technology for storage networking innovation.

Ed Chapman, vice president of product management, Server Access and Virtualization Group, Cisco, will discuss how IT organizations are evolving their data centers with new protocols such as Fibre Channel over Ethernet (FCoE) to reduce operating costs and simplify management. The presentation will include a glimpse at new technology being developed for unifying SAN and LAN networks in the data center.

Derek Masseth, Senior Director for Infrastructure Services at the University of Arizona, will describe how the university recently united its data center networks using Fibre Channel over Ethernet to create a unified fabric. Masseth will explain the reasons for choosing this technology and the upgrade process, as well as benefits and cost reductions achieved.

The event will air Tuesday, September 29, 2009, from 10:00 to 11:00 a.m. PDT. Attendees who experience difficulties connecting can contact support at (866) 614-0208 or (617) 778-9652. Phone support is available 30 minutes prior to and after the event, as well as during the videocast. Attendees may also submit an Online Support Request to CiscoTV_help@external.cisco.com or ciscotv_help@btci.com if necessary.

I've just spent some time debating with my book publisher at Whitehorse Press about what we should put into a new chapter to be included in the third edition of my book How to Set Up Your Motorcycle Workshop. The reason there's any debate is because we're in the middle of a change in computer architecture that's bigger than the introduction of the PC. (See my July 8 blog entry "Why a Thin Layer of Chrome Will be the New Thick.")

First of all, I need to specify what I mean by "PC." Some folks want to reserve the term for stand-alone desktop machines running a Windows operating system (OS). I, on the other hand, am old school. To me "PC" is just shorthand for "personal computer," and that means a computer made for personal use by, well, a person. It includes all the offerings of such machines from Acer to Zenith . Main PC OSs include Mac OS, certain distributions of Linux, and, of course, the various versions of Windows. It also includes laptops, tablets, etc. that are just modified packages for computers meant to be used in exactly the same way that the desktop systems are used.

Closely allied are workstations, which are intended for use in an intensive work environment. They are generally connected to an enterprise intranet, rather than directly to the Internet. They usually have enhanced processors and memories, and data-storage capabilities. They generally run larger and more involved programs appropriate to meeting enterprise-level needs.

Also similar to PCs are netbooks, which are essentially stripped-down models intended for thin-client applications, such as surfing the net. They have far less memory storage space, and may even lack hard drives. What distinguishes netbooks from what I call PCs is their intended use as thin-client terminals at the expense of making them practically useless for anything else.

Just as PCs' performance is sandwiched between that of workstations and netbooks, their price range is as well. Workstations are generally more expensive (often several times more expensive) than PCs, while netbooks typically cost far less.

In the past, any introduction to computer use would have to start with choosing an operating system. That's no longer the case, however. The choice of operating system has become pretty much moot, as there's application software available for every popular OS to do pretty much anything, and non-PC architectures are becoming increasingly important.

Advanced networking technologies, such as virtualization and cloud computing, are driving this shift by making it possible to serve up most applications, from email to computational fluid dynamics (CFD) as Web applications. With this technology, the user's computer becomes a thin client - little more than a terminal to display the system's user interface. Since Web applications are OS agnostic, choice of OS to run on your personal computing station (PC, netbook, mobile platform, or whatever) is immaterial.

These are not future technologies. As a technology journalist, I get to see these things develop years before mainstream media. I've been watching these technologies - and using them - for about five years. They are quite ready for prime time, and in regular use by mainstream computer users today.

All major ISPs use virtualization and cloud computing technology to run their operations. Most e-commerce sites are built on MySQL databases. This generation of PCs are capable of virtualization using software downloadable from Xen. Every bank website is a thin-client Web app.

Dell's already seeing PC sales crash. Microsoft's scrambling to react. Apple's already made the transition, as have Google and leading chip makers like Intel.

In the end, PCs as such will be squeezed practically out of existence. Very soon PCs will be dinosaurs. Ordinary folks won't have or want to have them. It'll all be netbooks and mobile computing. Even Kindle may be obsolete before it really gets started! It'll just be an application on next years' iPods and Blackberrys.

What will count will be the application you run, and not the OS.

The trend is moving much faster than I thought it would. I figured we'd still have another 2-3 years for it to roll out. Now it looks more like a matter of months.

The PC, as such, is already dead, the general public just doesn't know it, yet. PC sales will not recover significantly from the present slump. "Computer" sales growth has already moved to other platforms, such as products from Apple, RIM, and Palm.