Technology innovation and the beginning of Microsoft

We've talked about the evolution of a technology from vision to research prototype to product. We used the invention of the Web as an example, starting with the vision of Vannevar Bush, the research prototypes of Doug Engelbart, and the product developed by Tim Berners-Lee.

Microsoft co-founder Paul Allen has written a memoir, which was excerpted in a Vanity Fair magazine article describing the founding of Microsoft. Allen writes that he and high-school classmate Bill Gates discovered and fell in love with programming in 1968, and goes on to give a snapshot of IT innovation at that time.

That year, 1968, would be a watershed in matters digital. In March, Hewlett-Packard introduced the first programmable desktop calculator. In June, Robert Dennard won a patent for a one-transistor cell of dynamic random-access memory, or DRAM, a new and cheaper method of temporary data storage. In July, Robert Noyce and Gordon Moore co-founded Intel Corporation. In December, at the legendary “mother of all demos” in San Francisco, the Stanford Research Institute’s Douglas Engelbart showed off his original versions of a mouse, a word processor, e-mail, and hypertext. Of all the epochal changes in store over the next two decades, a remarkable number were seeded over those 10 months: cheap and reliable memory, a graphical user interface, a “killer” application, and more.

Engelbart gave his famous demo at the same time as products that would eventually make his prototypes practical were being invented (DRAM) and going into mass production (Intel).

What innovations are in the vision stage today? What innovations are in the research prototype stage today? Have any revolutionary new products been introduced recently? Information technology was a key field for innovation in 1968, what are the key fields today?

Own your connection infrastructure, use netBlazr

A while back I wrote an article and blog post stating:

The question is not whether we are going to deploy new infrastructure; the question is “who will own it?”

The article discusses several alternatives to ownership by the current telephone and cable companies: local governments, cooperatives, small ISPs, and home and building owners.

I know of two trials in which home owners purchase their own links to a backhaul point -- similar to what we now do with our sewer and gas lines, and one wireless access company called Fon.

Fon claims 1,726,336 "members." Members purchase an 802.11n base station that is augmented with several application-layer programs for $99 or €79 and share bandwidth with other members. There are eight Fon installations in my zip code, but only two have been active during the last hour. After several years, Fon deployment is not dense enough to provide a viable alternative to the cable and telephone ISPs in my area, and I don't expect it ever will be.

But, technology and business models improve, and a new company, netBlazr, hopes to sell small business owners equipment for forming a network. The $299 equipment package contains three 802.11n radios and a fast router. Fiber backhaul is supplied by netBlazr. The basic service is free, but they also offer a premium service and dedicated circuit plans with guaranteed speed for small businesses.

NetBlazr's technology and business model are different than Fon's. The extra radios and faster router should improve performance in densely populated areas -- the extra routers let netBlazr change the network architecture on the fly if something goes wrong. The network architecture and backhaul provisioning lead them to deploy in highly local areas. They pick a backhaul point then sign up customers they can reach from that location. They started in a small area within Boston, and will expand from there as demand and density allow. If things go well, they will expand to service office buildings in other cities.

Will netBlazr catch on and scale up to provide a viable alternative to the incumbents? It may be a long shot, but companies like Google or Craig's List seemed like long shots at one point. You never know -- improving technology is on their side and their competitors are not used to competition.

Appended link:

Here are the slides from netBlazr founder Brough Turner giving a talk on the advantages of WiFi over Wimax and LTE and introducing netBlazr.

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Update 6/12/2015

Fon announced today that they have over 15 million people sharing Internet access over their personally owned open hotspots. Since WiFi range is limited, the value of a Fon membership increases with dense coverage, and as shown here, most of the "Fonistas" are in Western Europe.

In addition to signing up individual users, Fon is making deals with Internet service providers. In the US, cable companies are rolling out their own versions of shared access as is Google Fiber.

ICT energy consumption -- in the data center and at home

We usually think of IT as saving energy, as being green. For example, we speak of the substitution of communication for transportation -- teleconferences replacing airplane trips. IT would save energy if all we used IT for was teleconferences, but our appetite for IT is growing rapidly.

This slide was taken from a Network World IT Roadmap talk by Frederic Chanfraou, Senior VP of IT at Schneider Electric.  (Schneider is an energy management company).

As you see, the production of data is growing rapidly and the cost of computing is falling rapidly. That leads to increased data center demand, and data centers consume a lot of energy. Chanfraou estimates that IT consumes 4% of our electricity today, and, if we do not increase efficiency, it would be 40% by the year 2030.

The problem goes beyond the data center. How about your home? What percent of your electric bill goes to information processing devices like TV sets, radios, computers, set-top boxes, DVRs, and chargers, as opposed to appliances, heating, lighting, and other uses?

Soluto, a cool program/service, measures boot time. Solid state disk wins big

When I got my new laptop with a solid state drive (SSD), I ran benchmarks comparing it to my old laptop and desktop with their hard drives. Windows 7 was faster than Vista, 64-bit was faster than 32-bit, and, most important, SSD was faster than a hard drive.

I've now run a final benchmark using Soluto, a program and service that analyzes and times the boot process. My new laptop, running 64-bit Windows 7 on an SSD loads 61 applications while booting in 36 seconds. My old laptop, running 32-bit Windows 7 on a hard drive loads 55 applications while booting in 2 minutes 32 seconds.

The SSD speed advantage makes for a qualitative improvement. SSD boot time is less than 25% of hard disk boot time, and it launches applications almost instantaneously. The responsiveness is relaxing. (The Soluto tag line, "enjoy your PC," is appropriate).

Soluto is a cool program/service. It shows all the programs you launch during boot divided into three groups: those you should not launch, those you may or may not want to launch and those that must be be retained.

You install Soluto locally, but it has a program description database to help you decide whether to drop a program. It also displays the percent of users who have decided to keep or drop a program. Finally, it keeps track of what you have taken out of the boot group, so you can add a program back with a single click if something unforeseen occurs.

A novel application -- drone helicopter with streaming cameras merges real and virtual worlds

Parrot, a French company, demonstrated an iPhone-controlled drone helicopter ("quadricopter") at the Consumer Electronics Show.

As you see in this video, the iPhone is used to control the drone and to view streaming video from its on-board cameras.



This is a novel application, using the iPhone to control a physical object and augmenting reality by letting you see what the drone sees -- it blends the real and virtual worlds.

This demo used an iPhone, but Parrot promises to port the application to other phones and tablets -- their goal is to sell the drones.

A few caveats -- Parrot refused to speculate on the price, but my guess is that it will be pretty expensive since it requires a lot of computing and mechanical hardware. The iPhone and the drone use WiFi to communicate, which limits its range. Power requirements will also cap flight length.

Lest those caveats discourage you, recall that the Wright brothers first flight lasted 12 second and covered 120 feet. It only took 66 years to get from that flight to a safe return flight to the moon, and information technology improves faster than aviation technology.

What sorts of devices will you be controlling in five years? What sorts of cameras and censors will be feeding data to your portable device?

64-bit Windows 7 upgrade -- disk reads are 25% faster

In a recent post, I mentioned that I had a new Dell laptop with a solid state disk (SSD) instead of a rotating magnetic disk (HD). I discussed the advantages of SSD and its relationship to Internet connection speed, and presented some rough benchmarks of disk speed. It was about twice as fast as my desktop computer and 4 times as fast as my old laptop with a hard disk.

Today I upgraded the operating system from 32 to 64-bit Windows 7, and re-ran the ATTO disk benchmark. As shown here, writes are about the same speed, but reads are 25% faster than with 32-bit Windows 7. I did not benchmark application load or boot time with the 32-bit operating system, but it feels noticeably faster now.

FCC survey of home and mobile connectivity -- most people don't know their connection speed, but they are satisfied

An FCC study shows that 80% of US home users do not know their Internet download speed. This is nearly unchanged from the 2006 Pew Internet study on Home Broadband Adoption.

Breaking the FCC survey down, men and young people are more likely to know their home download speed than women and older people:

• 71% of men do not know their speed.
• 90% of women do not know their speed.
• 73% of those between the ages of 18 and 29 do not know their speed.
• 88% of people age 65 do not know their speed.

There were somewhat less pronounced differences among different races and income groups.

The survey also inquired as to satisfaction with both home broadband and mobile Internet speeds:

• 50% of home broadband users are very satisfied.
• 41% of home broadband users are somewhat satisfied.
• 33% of mobile users are very satisfied.
• 38% of mobile users are somewhat satisfied.

Regardless of how you slice it, most people do not know how fast their Internet connections are and most people are satisfied with their connectivity, though mobile users are less satisfied than home users.

An important caveat is that they are satisfied with respect to the applications they now use. Would an email and Web surfing user be satisfied if they started uploading videos to YouTube, watching hi-definition movies or sporting events, playing multi-player games or holding family meetings over the Internet?

Do you know your connection speed? Are you satisfied with it? Going beyond your individual need for speed, how might society benefit from higher speeds?

SSD: faster storage; faster Internet

I got a Dell laptop with solid state storage (SSD) instead of a rotating magnetic disk drive (HD). As shown here, the SSD is about twice as fast as my desktop computer and 4 times as fast as my old laptop with a hard disk.

These benchmarks are not 100 percent comparable (the machines had different configurations and operating systems) nor realistic (they only test raw read/write speed), but they show a clear advantage for SSD.

The speed difference is confirmed by my subjective sense of the SSD machine -- program load times feel much shorter.

The SSD should also consume less power and be more reliable than the equivalent HD.

It is interesting to consider the trade off between running network applications like Google Docs versus local applications like Microsoft Word as storage and Internet speeds increase.

Today I have a 3 Mbps link to the Internet at my home, so my old laptop storage access is about 100 times faster than my Internet connection. With SSD, that jumps to around 400 times, favoring local applications.

If, as the (conservative) FCC plans, I can upgrade my Internet connection to 100 Mbps, the pendulum will swing back toward network applications. If Google's vision is realized, and I can connect at 1 Gbps, network applications will look still better. Furthermore, once an application is "fast enough," additional speed does not matter.

On the other hand, SSD performance is also improving -- it will be interesting to see how this all plays out.

Which applications are already fast enough on the Internet that you choose them over local applications? Which are close?

Ward Cunningham on the invention and role of the wiki

Ward Cunningham invented the wiki to facilitate discussion of programming technique between himself and some colleagues. (His original wiki is still evolving).

Moira Gunn recently interviewed Cunningham and a colleague about one of his current projects, ZoomAtlas, a geographical wiki with the ability to draw as well as write.

I edited the interview, excerpting Cunningham's comments on the invention of the wiki, his motivation, and role of wikis (7 min 44 sec).

As you hear in the interview, Cunningham invented the wiki to solve a problem he had, and he decided not worry about permissions and authorization, because he trusted the members of his community to be responsible.

He sees wikis as doing things that could not be done another way. For example, one could not have created the Wikipedia by paying experts, but it has succeeded as a volunteer community wiki. (The Wikipedia founders first tried to create an online encyclopedia by conventional means and failed).

Intel Light Peak -- goodbye USB?

We have seen many examples of early prototypes of devices that eventually became main stream. Intel hopes to replace your USB cable with an optical link they are calling "Light Peak."

Here you see a demonstration of a laptop streaming two simultaneous HDTV programs to a television set. The black box between the laptop and display will eventually disappear, leaving a USB replacement.

Today's USB 2.0 connections have a speed of 480 Mbps, while Light Peak connections will begin at 10 Gbps in both directions. With mass production and engineering refinement, speeds would increase well beyond that. This is a common pattern -- one technology approaches its limit, and is then leapfrogged by a new technology.

This also seems to happening as electronic flash storage replaces rotating magnetic disk drives. Many portable devices already use electronic storage, and flash is beginning to be used in laptops and servers. (I've ordered my next laptop with flash storage).

If Light Peak succeeds (and it may not), it will dramatically alter the speed relationships between input/output and storage devices and memory, resulting in significant system redesign.

Can you think of other instances in which a new information technology has replaced an older one? What did we use for storage before hard drives?

Three reasons the iPad will succeed. Whoops, make that two.

The Apple iPad was announced January 27. After years of hype, people were generally disappointed. The trade press carried many articles like this one listing ten missing features. It can not play Flash movies, the aspect ratio is not 16:9, AT&T is the only carrier, the battery can not be changed, the operating system cannot multi-task, there is no camera or HDMI interface to a TV set, etc.

For me, the most important missing feature is a microphone with accompanying speech recognition software. I want to be able to input marginal notes, email addresses, etc. without typing on a glass keyboard.

In spite of all of this criticism, I expected the iPad to succeed for three reasons.

The original Macintosh had 128 KB of memory, only a floppy disk for storage, and a tiny, monochrome screen. Still, its operating system and simple applications for image and word processing had graphical user interfaces (GUIs). The earlier Apple Lisa and Xerox Star also had GUIs, but failed because they were too expensive. By the time the Mac was delivered, technology had improved, and they had engineered a minimal system that was just good enough to get people excited and succed in the market. The timing was right.

As technology advanced, Apple upgraded the Mac, adding memory and a hard drive, followed by a larger screen, color, etc.

The same will happen with the iPad. Features will be added as technology improves. I am confident that Apple has a multi-year plan for iPad improvements, and it has the potential to become a significant device for consuming content -- games, books, periodicals and video of all sorts.

I was optimistic for a second reason. Apple understands that the device is only one part of a system that includes the application store, content deals, and synchronization with the desktop and Internet. Apple learned this lesson with their ill-fated Newton, the first pocket computer. The Newton failed because the hardware was not powerful enough, and, more important, because it did not synchronize with desktop machines.

I am confident that Steve Jobs and his colleagues are negotiating with TV, movie, book, newspaper, and magazine publishers for content deals as I type this.

The third reason I was confident was that Apple had legions of software developers who, because they had developed iPhone applications, were ready to go on the iPad. Their iPhone applications would run with little or no modification on the iPad, and their programmers were up to speed on Apple's software development tools, their software development kit (SDK).

Apple might have learned the importance of the developer community by watching Microsoft. Microsoft wooed independent software vendors (ISVs) from day 1. Since the early days of MSDOS, they invited ISVs to conferences, provided them with excellent tools, set up a developer's organization, etc. Apple has taken this a step further with their application store -- they also provide a distribution channel at a reasonable cost. They removed the "V" from ISV. Independent developers were just developers, not vendors.

That is the good news (for the iPad). The bad news is that Apple seems to be blowing off the developer community. To use Apple's SDK, a developer has to agree to draconian terms. For example, they can only sell through Apple.

At some point, Microsoft could have afforded to ignore the ISV community -- Windows had a monopoly -- it was the only game in town.

Unfortunately for Apple, their developers have alternatives -- Google's Android, Microsoft's mobile version of Windows 7, and Palm's webOS. Google seems to be the biggest threat. They just released a new version of their SDK, which is provided to developers without restriction, and they offer prizes for outstanding applications.

I am still betting on the success of the iPad, but the odds have dropped. Apple's high handed attitude toward developers could be the chink in their armor.

Concept videos guide new products like the Apple tablet

The long rumored Apple tablet computer is expected to be announced tomorrow.

People have high hopes for the Apple tablet, speculating about its features and applications like watching video, reading full color books with dynamic illustrations, and playing multi-player games.

We will know the details tomorrow (if it is announced), but we might get insight into the hardware, applications, and design goals from concept videos like this clip showing how one might one day read a magazine on a tablet.

Concept videos are similar to the futuristic concept cars displayed at auto shows. They offer a concrete, long run vision and provide general goals and direction.

Perhaps the most famous concept video was Apple's Knowledge Navigator, which was created in 1987, and foreshadowed networked communications in support of collaborative work. The future developments shown in these 1993 AT&T ads have pretty well been realized. Here's one on a possible future of the cell phone.

How much would you be willing to pay for content like movies, TV programs, books, periodicals and games downloaded to a tablet computer like the one shown above?

Which of today's applications and capabilities were predicted in the Knowledge Navigator video? Which are not in today's products?

LTE version 1.0. TeleSonora begins 4G cellular service in Scandinavia using Chinese equipment

We cover cellular networks and generations in discussing mobile and portable connectivity.

Today might be considered the first day of the fourth generation -- TeleSonera began offering commercial LTE (Long Term Evolution) service in central Stockholm and Oslo. This is LTE 1.0. It is not built into phones; it is not offered outside of Oslo and Stockholm; there is no competition; it does not fall back to 3G or WiFi; there are no tethering applications for creating portable WiFi hot spots, but it is here.

The service delivers download speeds in the 20-80 Mbps range and will cost 599 Swedish Kronor ($85) per month. There will be no data cap while the service ramps up, but after July 1 2010, they will impose a 30 GB-per-month cap. It also requires a Samsung plug in modem. The current version of the modem is LTE only, but they will soon have one that can fall back to the 3G network where LTE is unavailable.

When TeleSonera began testing in Oslo last June, they said rollout would begin in 2010, but demand for high speed mobile connectivity convinced them to push the start date up.

The equipment is manufactured by Huawei, a Chinese company. You may think of China as a manufacturer of cheap toys and other consumer goods, but they are becoming world leaders in high tech areas like telecommunication. Huawei European equipment sales were $3 billion in 2008, compared to just $160 million in 2003. Forty of the world's fifty largest telephone companies are now Huawei customers and 75% of their 2008 sales were outside of China. Globally, Huawei is the second largest mobile connectivity manufacturer.

Check this short video tour of the Stockholm base station, which has both 3G and the new LTE 4G equipment.

Verizon's FIOS Internet connectivity is $70 per month for up to 25 mbps download and 15 mbps upload. Would you rather have that or TeleSonera portable service in Stockholm?

What new applications and devices might this service enable?

Too cheap to virtualize? Intel's data center on a chip and the Carnegie-Mellon FAWN project

We discuss the evolution of server hardware configurations, and we may be witnessing the start of the next chapter.

Just as virtual servers -- which share processors -- are becoming popular, we see the cost of processors shrinking to the point where they may not be worth sharing. Intel has demonstrated a 48-processor chip which includes shared memory and an on-chip network connecting the processors. The power/speed trade off can also be adjusted under program control. As Intel says, they are working toward a "data center on a chip."



The FAWN project (fast array of wimpy nodes) at Carnegie Mellon University is prototyping this approach, and they say the results are promising. Preliminary results with FAWNs indicate that they are cost competitive with conventional architectures, but consume 3-10 times less power. Power consumption is a large and growing portion of data center cost.

Can you hear the difference when audio is compressed?

We have seen that images can often be compressed significantly without noticeable degradation.

A recent review asks whether one can distinguish between a file that is ripped from a CD with no loss and a compressed MP3 version of the same file.

There were only seven subjects in this small test. They were given two recordings of two rock songs and asked to tell which sounded best. One was a lossless recording ripped from a CD, the other the same file compressed. Some compared the lossless files to 192 kbps MP3s, others compared them to 320 kbps MP3s. (Apple iTunes music is 128 kbps).

Only one person could accurately pinpoint which tracks were MP3 in every case. Of the rest, three subjects picked the lossless track twice and the other three only made one correct choice.

This is obviously a limited test -- there were few subjects and few controls. The results might be affected by things like

• the quality of the playback equipment
• the hearing acuity of the subjects
• the familiarity of the music to the subjects
• the nature of the particular song or other audio

Still, a test like this makes one wonder whether bandwidth is wasted by a lossless file.

You could easily create a similar test and try it on your friends (and yourself).

It would also be interesting to do a test of recorded voice. Podcasts are typically delivered as 64 or 128 kbps MP3 files -- can listeners tell the difference? Would a higher data rate matter?

As storage cost falls and bandwidth increases, how is the audio compression tradeoff of file size versus quality affected?

An example of bad image processing on the Web

We discuss the importance of processing, resizing and compressing an image before uploading it to a Web site.

This image, found on the WiFi Alliance Web site, provides an excellent example of what not to do:



As we see in the property sheet, the image is 980 by 664 pixels and the file size is 1.28 megabytes:



Resizing and compressing the image before putting it on the Web site would have reduced it to about 5 kilobytes -- 1/250th the size of the original -- with no noticeable loss of quality. (Quality is not even important in this case since the image is just a button linked to a video).

Furthermore, the image is resized to 177 by 99 pixels, which distorts it by changing its aspect ratio. (It appears that the image was also distorted when it was captured).

We can learn from our and other's mistakes -- can you find other poorly processed images on the Web?

Software refinement -- from research to products -- an image processing example

We have discussed the birth of image processing with Ivan Sutherland's Sketchpad program in the 1960s. As we see in this video, Sketchpad could draw, rotate, resize, copy and combine images.

Since Sutherland's research, there has been tremendous improvement in hardware technology and innumerable engineering refinements to image processing software.

Software refinements require research and the development of prototypes before they become product features. Consider, for example, the PatchMatch algorithm developed in collaboration between Princeton University and Adobe Systems. Here we see a paper describing the algorithm and some demonstration videos. The paper was presented and the videos shown at an academic engineering conference.

Successful research like the PatchMatch algorithm is subsequently incorporated into commercial products. Here you see a demonstration of tools that use PatchMatch for image retargeting, completion and reshuffling integrated into Adobe Photoshop. The tools are being demonstrated at a trade show, and it is probably safe to say they will be in the next version of Photoshop.

This is typical of engineering refinements to software. A prototype is developed in a research lab and it later becomes a product.

Researchers typically work on things that are too demanding for the technology of the day. Some of the Princeton videos are shown at 5 times actual speed because it takes time to compute the new images. By the time these features are released in Photoshop, hardware will have improved and they will execute rapidly.

Note that Sutherland's work was a pure university effort, but PatchMatch was a joint effort between a university and a company. Many significant advances have come from industrial research labs. Can you find some interesting prototypes and projects at Microsoft Research?

Wireless data coverage is uneven

We discuss evolving cellular data generations. Today's third generation equipment provides for speeds of up to 2 mbps, but, as shown in this figure, download speed varies considerably from one city or neighborhood to another. The download speed to your iPhone 3G might be as low as 400 kbps or as high as 1,600 kbps.



The plot was generated by ARCchart, a wireless market research firm, and described by Brough Turner in a blog post. ARCchart monitored over two million performance tests using iPhone, Blackberry and Android phones, then filtered them to focus on major cities. This graph is based on 648,374 downloads from major cities in 103 nations between August 2008 and June 2009.

(Gizmodo performed a more limited test of Sprint, AT&T and Verizon 3G networks in eight US cities and also found considerable variance in download speed).

Of course, in some places there is no GSM coverage. Consider the coverage by AT&T, the GSM provider supporting the Apple iPhone in the US -- there is no coverage in the light-colored regions:



This map was taken from AT&T's coverage viewer in early September 2009, and coverage has continued expanding since then.

However, AT&T states that the maps are only an approximation, not a guarantee, of their coverage, which may be effected by terrain, weather, foliage, buildings and other construction, signal strength, customer equipment and other factors. There are many anecdotal reports of inability to use an iPhone in parts of San Francisco and the bay area.

Is technological progress slowing?

We have seen exponential progress in electronic, communication and storage technology during the last 60 years. As a result, computers and networks are now used by billions of people for a great number of applications. This "information revolution" has had an impact on our individual lives, organizations and society.

No doubt, computers and the Internet are a big deal, but Alfred Normann argues that they have not changed our lives as much as earlier inventions -- that he has not seen as much technological innovation as his parents and grandparents did. As we see in his illustration, shown below, a host of important inventions occurred during the 50 years between the Civil War and World War I and many others occurred during his grandmother's life. He feels that technological progress measured in terms of impact on our lives has slowed, not accelerated.

Ray kurzweil would disagree with Normann. He argues that accelerating improvement in information technology facilitates an accelerating accumulation of knowledge, which is leading rapidly toward an understanding of our own biology and intelligence. Kurzweil foresees radical medical breakthroughs, leading to the possibility of immortality, and machines that surpass human intelligence and continue to improve without us.

How does the impact of the Internet on individuals, organizations and society compare to the impact of inventions like the automobile, radio, television, antibiotics, electric lights, telephones, and nuclear weapons?

Will today's exploding knowledge of genetics and biology lead to a longer life for you and your children? Can you think of examples of things computers do today that would have been considered "intelligent" 50 years ago?

Proprietary research firms are an excellent source of information

Proprietary market research firms like The Yankee Group, Infonetics, and Forrester Research study various industries and technologies. They typically make money by holding specialized conferences and selling reports and consulting services to companies that are in or depend upon those industries and technologies. For example, a report on the future of WiFi would be of interest to both WiFi chip manufacturers and to computer companies that will be using those chips in their products.

Market research firms hire highly qualified analysts and sell the results of their research to many interested companies, enabling them to share the cost of the research. That is good news -- it makes business more efficient. The bad news is that the research reports are too expensive to be used in education.

But, since the market research firms want publicity, they provide some very useful information for free. They publish press releases and executive summaries of their reports as well as blogs and webinars.

Take The Yankee Group for example. They bill themselves as "The Global Connectivity Experts," making their research relevant to our class. Twenty six Yankee Group analysts write blogs with posts in 30 categories. You can read press releases on and summaries of their research here. Yankee Group analysts also present webinars on their research. One can register to watch these online presentations as they occur or download them afterward.

Which of the Yankee Group bloggers or topic categories is most relevant to our class? Which of the previous webinars seems most relevant?