I was able to find the following data from a study performed in late 2004:
IBM Could Lose PC Customers to Dell, HP
Quote: "Based on studies completed in July and November, Forrester
determined which of the remaining PC vendors would have the most to
gain in the corporate PC market. Data showed that IBM?s departure puts
almost 14 million U.S. corporate PCs up for grabs, with an estimated
75 million corporate PCs in use today.
In its survey, 46 percent of U.S. firms said desktops are refreshed
every three years, and about 31 percent said every four years. 53
percent said they refresh laptops every three years, and 22 percent
said every four years."
I also found the following footnote that uses the same Forrester
survey and explains how that figure was arrived at:
14 Million US Enterprise PCs Up For Grabs
Quote: "In 2005, the US work force will be about 150 million,
according to the US Bureau of Labor Statistics. To approximate the
number of business PCs in use in the US, we assume a ratio of about
five PCs for every 10 workers ? or 75 million PCs. In our survey, 46%
of US firms told us that they refresh their desktop PC every three
years, and about 31% told us every four years. Fifty-three percent
told us that they refresh laptops every three years, and 22% told us
every four years."
So while I can't say *for sure* that there are 75 million corporate PC
*users*, based on 75 million corporate PCs in use, I think it is a
Search Strategy (on Google):
* "corporate PC users" statistics 2004
* "corporate PC users" million 2004 "united states"
* 2004 "million corporate pcs"
* Forrester "corporate pcs" 2004 million