I started a part-time computer repair business in 1988 and named it Nielsen Technical Services. Then in the late 1990s I dicovered the Internet and wanted to have a web site. I registered NielsenTech.com in 1999 and paid $70 for the first 2 years! Man, that was expensive.
When I saw that NielsenTechnologies.com was going to expire in 2005 I bought that but don't really use it yet.
I'd have to count them again, but I have close to 60 domains.